On February 15, 2013, a superbolide meteor (brighter than the Sun) entered Earth's atmosphere over Chelyabinsk, Russia, and exploded at an altitude of 23.5 km. Eyewitnesses could feel the intense heat from the fireball, and the blast wave from the explosion blew out windows in buildings. The blast wave took approximately 2 minutes 30 seconds to reach ground level. (a) What was the average velocity (in m/s) of the blast wave? (Enter the magnitude.) x m/s (b) Compare this with the speed of sound, which is 343 m/s at sea level. Volast wave = sound

Answer:

(a). The mass of the rod is 15.9 g.

(b). The center of mass is 0.153 m.

Explanation:

Given that,

Length = 30.0 cm

Linear density [tex]\labda=50.0+20.0x[/tex]

We need to calculate the mass of rod

Using formula of mass

[tex]M=\int{dm}[/tex]

[tex]M=\int{(50.0+20.0x)dx}[/tex]

[tex]M=50.0x+10x^2[/tex]

Put the value of x

[tex]M=50.0\times0.30+10\times(0.30)^2[/tex]

[tex]M=15.9\ g[/tex]

We need to calculate center of mass

The center of mass has an x coordinate is given by

[tex]x_{cm}=\dfrac{\int{xdm}}{\int{dm}}[/tex]

We need to calculate the value of  [tex]\int{xdm}[/tex]

[tex]\int{xdm}=\int{(50.0x+20.0x^2)dx}[/tex]

[tex]\int{xdm}=25x^2+\dfrac{20}{3}x^3[/tex]

Put the value into the formula

[tex]\int{xdm}=25\times0.3^2+\dfrac{20}{3}\times(0.3)^3[/tex]

[tex]\int{xdm}=2.43[/tex]

Put the value into the formula of center of mass

[tex]x_{cm}=\dfrac{2.43}{15.9}[/tex]

[tex]x_{cm}=0.153\ m[/tex]

Hence, (a). The mass of the rod is 15.9 g.

(b). The center of mass is 0.153 m.

To find the mass of the rod, integrate the linear density function. To find the center of mass, set up an integral to find the position x such that the total mass on one side is equal to the total mass on the other side.

(a) To find the mass of the rod, we need to integrate the linear density function over the length of the rod. The linear density function is given by ℓ(x) = l + 20x, where x is the distance from one end measured in meters and l is in grams/meter. We can integrate this function from 0 to 0.3 meters (corresponding to a length of 30.0 cm) to find the total mass:

M = ∫(0 to 0.3) (l + 20x) dx

M = ∫(0 to 0.3) l dx + ∫(0 to 0.3) 20x dx

(b) To find the center of mass of the rod, we need to find the position x such that the total mass on one side of it is equal to the total mass on the other side. We can set up an integral to find this position:

x_cm = ∫(0 to x_cm) (l + 20x) dx - ∫(x_cm to 0.3) (l + 20x) dx

https://brainly.com/question/28996108

#SPJ2

Answer:

The time difference is 8.33 ms.

The phase difference between them is 60°

Explanation:

Given that,

Frequency = 10 Hz

Angle = 30°

We need to calculate the time difference

Using formula of time difference

[tex]\Delta t=\dfrac{\phi}{360^{\circ}\times f}[/tex]

Put the value into the formula

[tex]\Delta t=\dfrac{30}{360\times10}[/tex]

[tex]\Delta t=8.33\ ms[/tex]

If the frequency of these sine waves doubles, but the time difference stays the same,

[tex]f=20\ Hz[/tex]

We need to calculate the phase difference between them

Using formula of phase difference

[tex]\Delta \phi=\Delta t\times360\times f[/tex]

Put the value in to the formula

[tex]\Delta=8.33\times10^{-3}\times360\times20[/tex]

[tex]\Delta \phi=60^{\circ}[/tex]

Hence, The time difference is 8.33 ms.

The phase difference between them is 60°

Final answer:

To determine the time it takes for you to reach the open door and jump in, we can use the equations of motion. We know that you are initially 9.0 m away from the door, and the bus is accelerating at 1.0 m/s². The final velocity of the bus is not given, so we can't find the exact time it takes for you to reach the door. However, we can find the maximum time you can wait before starting to run and still catch the bus.

Explanation:

To determine the time it takes for you to reach the open door and jump in, we can use the equations of motion. We know that you are initially 9.0 m away from the door, and the bus is accelerating at 1.0 m/s². The final velocity of the bus is not given, so we can't find the exact time it takes for you to reach the door. However, we can find the maximum time you can wait before starting to run and still catch the bus.

To find the maximum time you can wait, we need to calculate when the distance between you and the door is equal to 0. Since you are moving towards the door at a constant speed of 5.7 m/s and the bus is accelerating away from you, the distance between you and the door will decrease over time. Let's call the time you wait before starting to run as 't'.

The distance traveled by the bus can be calculated using the equation:

S = ut + (1/2)at^2

Where S is the distance traveled, u is the initial velocity which is 0 m/s, a is the acceleration which is 1.0 m/s², and t is the time.

The distance traveled by you can be calculated using the equation:

S = vt

Where S is the distance traveled, v is your constant velocity which is 5.7 m/s, and t is the time.

After the time 't', both the bus and you will be at the same position which is the door. So the total distance traveled by you and the bus will be equal. We can set up the equation:

ut + (1/2)at^2 = vt

Simplifying this equation, we get:

(1/2)at^2 - vt = 0

Since we know that you can wait a maximum of 't' seconds, we need to solve this quadratic equation for 't'.

Using the quadratic formula:

t = (-b ± sqrt(b^2 - 4ac))/2a

Where a = (1/2)a, b = (-v), and c = 0

Substituting the values, we get:

t = (-(-v) ± sqrt((-v)^2 - 4(1/2)a(0)))/2(1/2)a

t = v + sqrt(v^2)/a

Now we can substitute the values of 'v' and 'a' to find the maximum time you can wait before starting to run:

t = 5.7 + sqrt((5.7)^2)/1.0

t = 5.7 + sqrt(32.49)/1.0 ≈ 5.7 + 5.7 = 11.4 seconds

Therefore, the maximum time you can wait before starting to run and still catch the bus is approximately 11.4 seconds.

To solve this problem we will apply the concepts related to Coulomb's law for which the Electrostatic Force is defined as,

[tex]F_{initial} = \frac{kq_1q_2}{r^2}[/tex]

Here,

k = Coulomb's constant

[tex]q_{1,2}[/tex] = Charge at each object

r = Distance between them

As the distance is doubled so,

[tex]F_{final} = \frac{kq_1q_2}{( 2r )^2}[/tex]

[tex]F_{final} = \frac{ kq_1q_2}{ 4r^2}[/tex]

[tex]F_{final} = \frac{1}{4} \frac{ kq_1q_2}{r^2}[/tex]

[tex]F_{final} = \frac{1}{4} F_{initial}[/tex]

[tex]\frac{F_{final}}{ F_{initial}} = \frac{1}{4}[/tex]

Therefore the factor is 1/4

so what do we want our website for the best of all I can get to see

A uniform line charge with 16.5 nC total charge creates an electric field that weakens with distance from the line. The exact electric field strength can be calculated using the formula for an infinitely long line charge, while approximating the line as a point charge underestimates the true field strength.

Solving for the Electric Field of a Uniform Line Charge

(a) Total Charge:

The total charge (Q) of a line charge can be found by integrating the linear charge density (λ) over the length (L) of the charge distribution:

Q = ∫λ dx (from x = 0 to x = 5.0 m)

Here, λ = 3.3 nC/m and L = 5.0 m.

Q = (3.3 nC/m) * (5.0 m) = 16.5 nC

Therefore, the total charge is 16.5 nC.

(b) Electric Field at x = 6 m (Exact):

Because the line charge is infinitely long, we can apply the electric field formula:

E = (λ / (2πε₀)) * ln(2a / b)

Plugging in the values:

E = (3.3 x 10⁻⁹ C/m) / (2π * 8.854 x 10⁻¹² C²/N∙m²) * ln(2 * 6 m / 0)

E ≈ 47.7 N/C (rounded to two significant figures)

(c) Electric Field at x = 10.0 m (Exact):

Following the same method as part (b):

E ≈ (3.3 x 10⁻⁹ C/m) / (2π * 8.854 x 10⁻¹² C²/N∙m²) * ln(2 * 10.0 m / 0)

E ≈ 33.1 N/C (rounded to two significant figures)

(d) Electric Field at x = 270 m (Exact):

Using the same formula:

E ≈ (3.3 x 10⁻⁹ C/m) / (2π * 8.854 x 10⁻¹² C²/N∙m²) * ln(2 * 270 m / 0)

E ≈ 0.012 N/C (rounded to three significant figures)

(e) Electric Field at x = 270 m (Approximation):

Assuming the charge is a point charge at x = 2.5 m (center of the line charge):

E ≈ k * Q / (x - 2.5 m)²

(f) Ratio of Approximation to Exact Result:

Ratio = (Approximate Electric Field) / (Exact Electric Field)

Ratio ≈ (2.02 x 10⁻⁴ N/C) / (0.012 N/C) ≈ 0.0017

(g) Comparison of Results:

Since the ratio is less than 1, the approximate result (2.02 x 10⁻⁴ N/C) is smaller than the exact result (0.012 N/C).  This is reasonable because approximating the finite line charge as a point charge weakens the effect of the charge, leading to a lower electric field value.

Answer:

Q = 1.095 x 10^-9 C

Let the force experienced by the top piece of tape be F

F = kQ²/r²

r = distance between the two pieces tape = 1.00cm = 1.00 x 10^ -2 m

1/4(pi)*Eo = k = 8.99 x 10^9 Nm²/C²

The electric force of repulsion between the two charges and the weight of the top piece of tape are equal so

F = kQ²/r² = mg

Where m is the mass of the top piece of tape and g is the acceleration due to gravity

On re-arranging the equation above,

Q² = mgr²/k

Q² = ((11.0 x 10^-6) x 9.8 x (1.00x10^-2)²)/(8.99 x 10^9)

Q = 1.095x10^-9 C

Explanation:

The charge Q on both pieces of tape are equal and both act with a force of repulsion on each other.

The force of repulsion between both tapes pushes the top piece of tape upwards. The weight of the top piece of tape acts vertically downward. Since the top tape is in a position of equilibrium, the two forces acting on the top piece of tape must be equal to each other. This assumption is backed up by newton's first law of motion which states that the summation of all forces acting on a body at rest must be equal to zero. That is

Fe (electric force) - Fg (gravitational force) = 0

Fe = Fg

kQ²/r² = mg

On substituting the respective values for all variables except Q and rearranging the equation Q = 1.09 x 10^-9

Answer:

Time taken is 0.087 s

Solution:

As per the question:

Time period, T = 0.300 s

Amplitude, A = 6.00 cm

Now,

To calculate the time taken:

For SHM, we know that:

[tex]x = Acos\omega t[/tex]                               (1)

At x = 6.00 cm, the object comes to rest instantaneously at times t = 0.00 s

Thus from eqn (1), for x = 6.00  cm:

[tex]6.00 = 6.00cos\omega t[/tex]

[tex]cos\omega t = 1[/tex]

[tex]\omega t = cos^{- 1}(1)[/tex]

[tex]\omega t = 0[/tex]

Thus at t = 0.00 s, x = 6.00 cm

Now,

Using eqn (1) for x = - 1.50 cm:

[tex]- 1.50 = 6.00cos\omega t'[/tex]

[tex]cos\omega t' = -0.25[/tex]

We know that:

[tex]\omega = \frac{2\pi}{T}[/tex]

Thus

[tex]\frac{2\pi}{0.300} t' = cos^{- 1}(0.25)[/tex]

[tex]t' = 0.087\ s[/tex]

Time taken by the object in moving from x = 6.00 cm to x = 1.50 cm:

t' - t = 0.087 - 0.00 = 0.087 s

To find the time it takes for the object to go from x = 6.00 cm to x = -1.50 cm, we use the equation for simple harmonic motion. The time it takes is half of the period, which is 0.150 s.

To find the time it takes for the object to go from x = 6.00 cm to x = -1.50 cm, we need to use the equation for simple harmonic motion (SHM). The equation is given by x = A * cos(2π/T * t + φ), where x is the position, A is the amplitude, T is the period, t is the time, and φ is the phase shift.

First, we need to determine the phase shift. At t = 0, the object is at rest at x = 6.00 cm. This means the phase shift is 0, because the cosine function is at a maximum at t = 0.

Next, we can plug in the values into the equation. The amplitude A is 6.00 cm and the period T is 0.300 s. We want to find the time it takes for the object to go from x = 6.00 cm to x = -1.50 cm. In SHM, the object goes from -A to A and back in one period, so the time it takes to go from x = 6.00 cm to x = -1.50 cm is half of the period. Therefore, the time is 0.300 s / 2 = 0.150 s.

https://brainly.com/question/22422926

#SPJ3

Let's start from the definition of attraction and repulsion. Similar charges tend to repel each other, while different charges attract. When work is done due to the force of attraction its value will be negative, while if work is done due to the force of repulsion its value will be positive.

Given this the sphere has a negative charge.

In other words, if the balloon has a positive charge, it will be attracted by the sphere with negative charge. In this case, you would not have to do a positive job to bring them together. If the balloon has a negative charge, it will be repelled by the sphere with a negative charge. In this case, you will do a positive job to unite them.

Therefore, the load on the balloon is negative.

The charge on the ballon will be Negative

The answer to this question is based on the column's law of forces of attraction and repulsion between two charged atoms.

The formula for calculating the magnitude of the forces is given as

[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]

Here [tex]q_1 & \ q_2[/tex]  are the two charged atoms

r = Distance between the two particles

k is constant

Now if two charged particles are having like charges that are both charged particles carrying positive or both carrying a negative charge then there will be Force of repulsion created between them

If both the  Particles have the opposite charges on them then there will be a force of attraction between them.

The charge on the ballon will be negative that's why there is positive work needed to  bring the ballon  towards the negatively charged sphere

Thus the charge on the ballon will be Negative

To know more about the nature of the charges follow

https://brainly.com/question/18108470

Answer:[tex]44.1\times 10^6[/tex] atoms

Explanation:

According to the ideal gas equation:

[tex]PV=nRT[/tex]

P = Pressure of the gas = [tex]1.83\times 10^{-7}N/m^2=1.81\times 10^{-12}atm[/tex]     [tex]1N/m^2=9.87\times 10^{-6}atm[/tex]

V= Volume of the gas = [tex]1cm^3=1ml=0.001L[/tex]       (1L=1000ml)

T= Temperature of the gas = 28°C = 301 K      [tex]0^0C=273K[/tex]  

R= Gas constant = 0.0821 atmL/K mol

n=  moles of gas= ?

[tex]n=\frac{PV}{RT}=\frac{1.81\times 10^{-12}atm\times 0.001L}0.0821Latm/Kmol\times 301K}=7.32\times 10^{-17}moles[/tex]

Number of atoms =[tex]moles\times {\text {avogadro's number}}=7.32\times 10^{-17}mol\times 6.023\times 10^{23}mol^{-1}=44.1\times 10^6atoms[/tex]

Thus there are [tex]44.1\times 10^6[/tex] atoms  in a cubic centimeter at this pressure and temperature.

The given speed of Earth in km/sec is converted first to miles/sec and then to miles/hour, resulting in an average speed of Earth around the Sun of approximately 66,661.6 miles/hour.

To solve this, we need to convert kilometers to miles and seconds to hours. First, we should know that 1 kilometer is approximately 0.621371 miles, and 1 hour has 3600 seconds.

Given that, we can first convert Earth's speed from kilometers per second to miles per second by multiplying by the conversion factor:

29.783 km/sec * 0.621371 mile/km = 18.5171 miles/sec.

Next, we convert seconds to hours:

18.5171 miles/sec * 3600 sec/hour = 66,661.6 miles/hour.

So, the average speed of the Earth around the Sun, in miles per hour, to five significant figures is 66,661.6 miles/hour.

https://brainly.com/question/34421469

#SPJ3

Final answer:

The Earth travels around the Sun at an average speed of 29.783 km/s, which is approximately 66,636.7 miles per hour when converted using the steps of multiplying by 3600 to get km/hr and then by the conversion factor for km to mi.

Explanation:

The student's question is about converting the speed of the Earth's orbit around the Sun from kilometers per second to miles per hour. The given speed is 29.783 km/s. To convert this to miles per hour, we can follow these steps:

Multiply the kilometres per second by 3600, which is the number of seconds in an hour, to get the kilometres per hour.

Convert kilometers per hour to miles per hour by multiplying by the conversion factor (1 kilometer is approximately 0.621371 miles).

Performing these calculations:

29.783 km/s × 3600 s/hr = 107218.8 km/hr

107218.8 km/hr × 0.621371 mi/km = 66636.7 miles per hour

Therefore, Earth travels around the Sun at an average speed of 66,636.7 miles per hour, expressed with five significant figures.

Answer:

 U₂ = 400 KJ      

Explanation:

Given that

Initial energy of the tank ,U₁= 800 KJ

Heat loses by fluid ,Q= - 500 KJ

Work done on the fluid ,W= - 100 KJ

Sign -

1.Heat rejected by system - negative

2.Heat gain by system - Positive

3.Work done by system = Positive

4.Work done on the system-Negative

Lets take final internal energy =U₂

We know that

Q= U₂ - U₁ + W

-500 = U₂ - 800 - 100

U₂ = -500 +900 KJ

U₂ = 400 KJ

Therefore the final internal energy = 400 KJ

Answer:The process that prevents the bodies of dead plant from filling the earth is decomposition of their remains.

Explanation:

1. Fungi and bacteria in the soil help decompose the remains of dead plant and uses them to enrich and nourish other plants that are alive.

2. Insects, worms and other invertebrates feed on the too

To solve this problem we will calculate the total volume of inhaled and exhaled water. From the ideal gas equation we will find the total number of moles of water.

An athlete at high performance inhales 4.0L of air at 1atm and 298K.

The inhaled and exhaled air contain 0.5% and 6.2% by volume of water, respectively.

During inhalation, volume of water taken is

[tex]V_i = (4L)(0.5\%)[/tex]

[tex]V_i = 0.02L[/tex]

During exhalation, volume of water expelled is

[tex]V_e = (4L)(6.2\%)[/tex]

[tex]V_e = 0.248L[/tex]

During 40 breathes, total volume of water taken is

[tex]V_{it} = (40L)(0.02L) = 0.8L[/tex]

During 40 breathes, total volume of water expelled out is

[tex]V_{et} = (40L)(0.248L) = 9.92L[/tex]

Therefore resultant volume of water expelled out from the lung is

[tex]\Delta V = 9.92L-0.8L = 9.12[/tex]

From the body through the lung we have that

[tex]n = \frac{PV}{RT}[/tex]

Here,

P = Pressure

R= Gas ideal constant

T= Temperature

V = Volume

Replacing,

[tex]n = \frac{(1atm)(9.12L)}{(8.314J/mol \cdot K)(298K)}[/tex]

[tex]n = 0.373mol/min[/tex]

Therefore the moles of water per minute are expelled from the body through the lungs is 0.373mol/min

The athlete expels 8.89 x 10^-2 moles of water per minute through the lungs.

To calculate the number of moles of water per minute expelled by the athlete through the lungs, we need to determine the amount of water evaporated with each breath and then multiply it by the respiration rate. According to the information provided, an average breath is about 0.5 L, and each breath evaporates 4.0 x 10^-2 g of water. We can convert grams of water to moles by dividing by the molar mass of water (18.02 g/mol). So, the moles of water evaporated with each breath are (4.0 x 10^-2 g)/(18.02 g/mol) = 2.22 x 10^-3 mol/breath.

Next, we can calculate the number of breaths per minute multiplied by the moles of water evaporated per breath to find the moles of water expelled per minute. The respiration rate is given as 40 breaths per minute. Therefore, the moles of water expelled per minute are (2.22 x 10^-3 mol/breath) x 40 breaths/minute = 8.89 x 10^-2 mol/minute.

Answer:

The black body temperature of Earth T_e= 180.4 K

Explanation:

Assuming we have to find Black body temperature of the earth.

[tex]T_e =(\frac{s_o(1-\alpha)}{4\sigma})^{0.25}[/tex]

S0= solar energy striking the earth= 343 Wm^{-2}

\alpaha = 30% = 0.3

\sigma = stephan boltsman constant.= 5.67×10^{-8} Wm^{-2}K^4

[tex]T_e =(\frac{343(1-0.3)}{4\times5.67×10^{-8}})^{0.25}[/tex]

T_e= 180.4 K

Answer:b and e

Explanation:

When electron and proton are placed in the same Electric field then the force experienced by electron and proton is the same as the charge possessed by them is the same . The direction of force is different on them but the magnitude is the same.

The electric field force is the product of charge and strength of the electric field.

We know the mass of an electron is less than the mass of proton that is why the acceleration of electron is more as compared to proton for the same Electric force.

thus option b and e are correct.                                  

The statements which are true of a "free" electron and a "free" proton are placed in an identical electric field are: Choice b and Choice e.

According to the question:

In essence, the magnitude of the Coulumb's force of attraction or repulsion is the same for the free electron and free proton.

However, the direction of the forces are opposite as the protons and electron have opposing signs.

Additionally, since the mass of an electron is relatively infinitesimal compared to a proton, The acceleration of the electron is greater than that of the proton.

Read more:

https://brainly.com/question/13388252

Answer:

Mass of the wooden Block is 20g.

Explanation:

The buoyant force equation will be used here

Buoyant Force= ρ*g*1/2V Here density used is of water

m*g= ρ*g*1/2V

Simplifying the above equation

2m= ρ*V Eq-1

Also we know from the question that

ρ*V = m + 0.020 Eq-2 ( Density = (Mass+20g)/Volume )

Equating Eq-1 & Eq-2 we get

2m = m+0.020

m = 0.020kg

m = 20g

Answer:

165 Hz, 220 Hz, and 275 Hz belongs to pipe open at both ends

165 Hz, 275 Hz, and 385 Hz belongs to pipe closed at one end

Explanation:

Open ended pips have harmonic frequencies that are multiple of the fundamental frequency

Find the fundamental frequency for each of the samples:

165Hz, 275Hz, 385Hz

(275-165)=110

(385-275)= 110

165 Hz, 220 Hz, and 275 Hz

(220-165)=55

(275-220)=55

F= 55

Note that 165 =3f

220=4f

275=5f

SO these frequencies are multiples of the fundamental frequency

Answer / Explanation

The question in the narrative is incomplete.

Kindly find the complete question below:

If the gap between C and the rigid wall at D is  initially 0.15 mm, determine the support reactions at A and  D when the force is applied. The assembly  is made of A36 steel

Procedure

Recalling the the equation of equilibrium and referencing the free body diagram of the assembly,

Therefore, ∑fₓ  = 0 ,

where, 20 ( 10³) - Fₐ - Fₙ = 0 --------------equation (1)

Now, recalling the compatibility equation, while utilizing the superposition method,

Therefore, δₓ - δfₓ

= 0.15  = 200(10³)(600) ÷ π/4 (0.05²)(200)(10⁹) - [ Fₐ (600) / π/4 (0.05²)(200)(10⁹) + Fₐ (600) π / 4 (0.05²)(200)(10⁹) ]

Solving this further,

We get: Fₐ = 20365.05 N

 Which is equivalent to = 20.4 kN.

Now, substituting the answer (Fₐ) into equation (1)

                Fₙ = 179634.95 N

                        = 180 kN

Answer:

[tex]L=6.21m[/tex]

Explanation:

For the simple pendulum problem we need to remember that:

[tex]\frac{d^{2}\theta}{dt^{2}}+\frac{g}{L}sin(\theta)=0[/tex],

where [tex]\theta[/tex] is the angular position, t is time, g is the gravity, and L is the length of the pendulum. We also need to remember that there is a relationship between the angular frequency and the length of the pendulum:

[tex]\omega^{2}=\frac{g}{L}[/tex],

where [tex]\omega[/tex] is the angular frequency.

There is also an equation that relates the oscillation period and the angular frequeny:

[tex]\omega=\frac{2\pi}{T}[/tex],

where T is the oscillation period. Now, we can easily solve for L:

[tex](\frac{2\pi}{T})^{2}=\frac{g}{L}\\\\L=g(\frac{T}{2\pi})^{2}\\\\L=9.8(\frac{5}{2\pi})^{2}\\\\L=6.21m[/tex]

To solve this problem we will apply the concepts related to the linear kinematic movement. We will start by finding the speed of the body from time and the acceleration given.

Through the position equations we will calculate the distance traveled.

Finally, using this same position relationship and considering the previously found speed, we can determine the time to reach your goal.

For time (t) and acceleration (a) we have to,

[tex]t = 8s, a = 165m/s^2[/tex]

The velocity would be,

[tex]u = a*t \\u = 165*8\\u = 1320m/s[/tex]

Now the position is,

[tex]h= \frac{1}{2} at^2[/tex]

[tex]h = \frac{1}{2} 165*8^2[/tex]

[tex]h = 5280m[/tex]

Now with the initial speed and position found we will have the time is,

[tex]h=ut +\frac{1}{2} at^2[/tex]

[tex]-5280=1320t - \frac{1}{2} 9.8t^2[/tex]

[tex]4.9t^2-1320t-5280=0[/tex]

Solving the polynomian we have,

[tex]t = 273.33s = 4.56minutes[/tex]

Therefore  the rocket will take to hit the ground around to 4.56min

First, we need to determine the velocity of the rocket at the time the rocket is dropped after 8 seconds of powered ascent.
Given the constant acceleration of 165 m/s^2, the velocity (v) at 8 seconds can be found using the formula
v = at
where 'a' is the acceleration and 't' is the time.
Therefore, v = 165 m/s^2 x 8 s = 1320 m/s.

Now that the rocket is dropped, it will initially have the velocity of the rocket at that instant, which is 1320 m/s upward. To find out how long it takes for the rock to reach the highest point, we use the formula
v = u + at
where 'u' is initial velocity, 'v' is final velocity (0 m/s at the highest point), 'a' is the acceleration due to gravity (which is negative since it is in the opposite direction to the initial motion), and 't' is the time.
Solving for time, we get
t = -u/g. With g ≈ 9.81 m/s^2, the time to reach the highest point is
t ≈ -1320 m/s / -9.81 m/s^2 ≈ 134.6 s.

After reaching the highest point, the rocket will start falling back to the ground. Since the rocket starts from rest at the highest point, we can use the formula
s = 0.5gt^2
where 's' is the distance and 't' is time, to calculate the time it takes to fall to the ground.
But since we already have the time to reach the highest point, we can simply double that time to find the total time taken for the round trip, because the time to go up is the same as the time to come down in free fall. So the total time taken for the rocket to hit the ground is
134.6 s up + 134.6 s down = 269.2 s.

Answer:

(A) position vs time

(B) Force vs position

(C) velocity vs time

Explanation:

Part A

This graph shows that the position of the block increases with time along the x-axis exponentially (that is it increases in unequal amounts in equal time intervals). This is because the velocity of the block is changing with time and as a result the position changes in unequal amounts per time

PartB

The force on the spring increases in a negative direction going from zero to a negative value. This is because the spring is being compressed from configuration 1 to 2. The force of compression on a spring is usually taken to have a negative sign and expansion to have a positive sign. So in this case force becomes increasingly negative with time.

Part C

The velocity of the block decreases from a positive nonzero value (v>0) to zero because the spring resists the motion of the block. As a result the block comes to a stop momentarily. The velocity decreases exponentially because the acceleration of the block is also changing with time since the force of the block is decreasing with time.

Thank you for reading.

Answer:

a friction force that opposes its movement

All this force has a direction opposite to that of the car

Explanation:

A car traveling at 83 km / h with constant speed has a friction force that opposes its movement, this force comes from several sources:

.- The air resistance that is proportional to the speed

/ - the resistance between the rubbers and the pavement that is constant

.- The internal friction of the different engine components

.- The formation of eddies due to the lack of aerodynamic shape of the car

All these forces must be counteracted the motor force

All this force has a direction opposite to that of the car

Answer:

Yes, a frictional force would be required parallel to the bank in the direction downwards the bank to prevent the car from moving off the bank.

Question:

A 1050-kg car rounds a curve of radius 72 m banked at an angle of 14°. If the car is traveling at 83 kmh, will a friction force be required? If so, in what direction?

Explanation:

When a car is to move round a curve with a particular radius, the centrifugal force due to rounding the curve would act on it, which would try to push it off the bank.

As a result of the inclined bank, a force as a result of gravity will act on it to prevent it from moving off the bank.

Fc = mv^2/r

Fw = mgsin14

Where;

Fc is the centrifugal force.

m = mass

Fw = force as a result of weight.

v = velocity of car

r = radius of circular path

g = acceleration due to gravity.

Looking at the two forces, due to the high speed of the car, low angle of inclination of the bank and relatively low radius of round path, the centrifugal force will be high than the force resulting from the weight to keep the car on the track.

Fc > Fw

Fc is directed out of the bank

Fw is try to keep the car on track

Therefore, when Fc > Fw and without frictional force acting inward(down the bank) to neutralise the centrifugal force the car would move off the bank and out of the round curve track. So frictional force is needed in the direction downwards the bank to keep the car on track.

Answer:

(c)  As 'd' becomes doubled, energy decreases by the factor of 2

Explanation:

Energy stored in a parallel plate capacitor is given by:

[tex]U=\frac{1}{2}CV^2\\\\C=\frac{A\epsilon_{o}}{d}\\\\then\\\\U=\frac{1}{2}\frac{A\epsilon_{o}}{d}V^2--(1)\\\\[/tex]

As capacitor remains connected to the battery so V remains constant. As can be seen from (1) that energy is inversely proportional to the separation between the plates so as 'd' becomes doubled, energy decreases by the factor of 2.

Answer:

(c) It decreases by a factor of 2

Explanation:

Since the capacitor is still connected to the power source, the potential difference remain the same even when the distance is a doubled.

The energy stored in a capacitor can be written as:

E = (1/2)CV^2 .....1

And the capacitance of a capacitor is inversely proportional to the distance between the two plates of the capacitor.

C = kA/d ....2

Therefore, when d doubles, and every other determinant of capacitance remains the same, the capacitance is halved.

Cf = kA/2d = C/2

Cf = C/2

Since the capacitance has been halved and potential difference remains the same, the energy stored would also be halved since the energy stored in the capacitor is directly proportional to the capacitance.

Ef = (1/2)(Cf)V^2

Ef = (1/2)(C/2)V^2 = [(1/2)CV^2]/2

Ef = E/2

Where;

E and Ef are the initial and final energy stored in the capacitor respectively

C and Cf are the initial and final capacitance of the capacitor.

d is the distance between the plates

A is the area of plates

k is the permittivity of dielectrics

Therefore the energy stored in the capacitor is decreased by a factor of 2, when the distance is doubled.

Answer:a) The bullet will miss the monkey because the monkey falls down while the bullet speeds straight forward.

Explanation: The bullet keeps as it aim( the monkey) unless it is redirected by an external force that could redirect it. Hence, the bullet speeds straight forward.

Final answer:

(b) The bullet will hit the monkey because both the monkey and the bullet are subject to gravity's acceleration equally upon being released or fired; both will fall downward at the same rate. Hence, (b) is the correct option.

Explanation:

When a hunter aims horizontally at a monkey in a tree and the monkey drops at the moment the gun is fired, the outcome is determined by Newtonian physics.

According to Newton's laws, the bullet and the monkey are both subject to gravity and will start to fall toward the ground at the same rate, regardless of any horizontal motion. Therefore, the correct answer is:

b) The bullet will strike the monkey because gravity causes both the bullet and the monkey to fall at the same speed.

This scenario illustrates the principle that horizontal and vertical motions are independent of each other. When the gun is fired, the bullet travels forward while also accelerating downward due to gravity.

Since the monkey begins to fall at the same moment the bullet is fired, both the bullet and the monkey undergo the same downward acceleration, meaning they will fall together.

Explanation:

Equilibrium position in y direction:

W = Fb (Weight of the block is equal to buoyant force)

m*g = V*p*g

V under water = A*h

hence,

m = A*h*p

Using Newton 2nd Law

[tex]-m*\frac{d^2y}{dt^2} = Fb - W\\\\-m*\frac{d^2y}{dt^2} = p*g*(h+y)*A - A*h*p*g\\\\-A*h*p*\frac{d^2y}{dt^2} = y *p*A*g\\\\\frac{d^2y}{dt^2} + \frac{g}{h} * y =0[/tex]

Hence, T time period

T = 2*pi*sqrt ( h / g )

Answer

F = 124 N

Explanation:

given,

mass, m = 5 Kg

time, t = 4.1 s

displacement = y(t)=(2.80 m/s)t +(0.61 m/s³)t³

velocity

[tex]\dfrac{dy(t)}{dt}=2.80 + 1.83 t^2[/tex]

[tex]v=2.80 + 1.83 t^2[/tex]

again differentiating to get the equation of acceleration

[tex]\dfrac{dv}{dt}= 3.66 t[/tex]

[tex]a= 3.66 t[/tex]

force at time t = 4.10 s

F = m a

F = 5 x 3.66 x 4.1

F = 75 N

the net force when crate is moving upward

F = Mg + Ma

F = 5 x 9.8 + 75

F = 124 N

the magnitude of force is equal to 124 N

Answer:

Yes, there will a force acting on the positive point charge. The options provided are that of negative point charge, rather than a positive point charge stated in the question

Explanation:

Here is the explanation:

When a capacitor is charged, one plate is positively charge and the other is negatively charged. In between the oppositely charged plates, there exist a potential difference. A positive point charge placed in the distance between the two plate will experience an electric force due to the potential difference. The direction of the force will be directed away from the positvely charged plate and towards the negatively charged plate. The reason is due to the law of electrostatic force, which states: like charges repel and unlike charges attract.

A parallel-plate capacitor consists of two large, flat, metal plates held parallel to each other. A positive point charge placed in the gap between the plates and near the center will experience an electric force directed away from the positive plate and towards the negative plate.

A device called a parallel-plate capacitor consists of two large, flat, metal plates held parallel to each other and separated by a small gap. When a positive point charge is placed in the gap between the two plates and near the center of each plate, it experiences an electric force.

The direction of the electric force on the negative charge is from the positive plate towards the negative plate. This means the electric force is directed away from the positive plate and towards the negative plate.

https://brainly.com/question/21093704

#SPJ3

Answer:

a)P=462.70 Pa

b)h = 0.047 m of water

Explanation:

Given that

Pressure ,[tex]P=\dfrac{1}{2}\rho V^2[/tex]

[tex]\rho = 1.2\ kg/m^3[/tex]

V= 100 km/h

[tex]V=100\times \dfrac{1000}{3600}\ m/s[/tex]

V=27.77 m/s

The pressure P

[tex]P=\dfrac{1}{2}\rho V^2[/tex]

[tex]P=\dfrac{1}{2}\times 1.2\times 27.77^2\ Pa[/tex]

P=462.70 Pa

We know that density of the water [tex]\rho=1000\ kg/m^3[/tex]

Lets height of the water column = h m

We know that

[tex]_P=\rho _w g h[/tex]

462.70 = 1000 x 9.81 h

[tex]h=\dfrac{462.7}{1000\times 9.81}\ m[/tex]

h = 0.047 m of water

a)P=462.70 Pa

b)h = 0.047 m of water

a)The presuure rise will be P=462.70 Pa

b) The height of the water column h = 0.047 m of water

It is given that

Pressure,

[tex]p= \dfrac{1}{2} \rho v^2[/tex]

Here   [tex]\rho =1.2 \ \dfrac{kg}{m^3}[/tex]

[tex]V=100\ \frac{km}{h} =\dfrac{100\times 1000}{3600} =27.77 \ \dfrac{m}{s}[/tex]

Now to calculate the pressure P

[tex]P=\dfrac{1}{2} \rho v^2[/tex]

[tex]P= \dfrac{1}{2}\times 1.2\times (27.77)^2[/tex]

[tex]P=462.70 \ \frac{N}{m^2}[/tex]

As we know that the density of water

[tex]\rho = 1000\ \frac{kg}{m^3}[/tex]

Lets height of the water column = [tex]h_m[/tex]

As We know that

[tex]P= \rho_w gh[/tex]

[tex]462.70=1000\times 9.81\times h_m[/tex]

[tex]h_m=0.047\ m \ of \ water[/tex]

Thus

a)The presuure rise will be P=462.70 Pa

b) The height of the water column h = 0.047 m of water

To know more about the pressure of fluids follow

https://brainly.com/question/24827501

Answer:

The period of oscillation is 1.33 sec.

Explanation:

Given that,

Mass = 275.0 g

Suppose value of spring constant is 6.2 N/m.

We need to calculate the angular frequency

Using formula of angular frequency

[tex]\omega=\sqrt{\dfrac{k}{m}}[/tex]

Where, m = mass

k = spring constant

Put the value into the formula

[tex]\omega=\sqrt{\dfrac{6.2}{275.0\times10^{-3}}}[/tex]

[tex]\omega=4.74\ rad/s[/tex]

We need to calculate the period of oscillation,

Using formula of time period

[tex]T=\dfrac{2\pi}{\omega}[/tex]

Put the value into the formula

[tex]T=\dfrac{2\pi}{4.74}[/tex]

[tex]T=1.33\ sec[/tex]

Hence, The period of oscillation is 1.33 sec.

Answer:

[tex]\Delta x=1-0=1\ m[/tex]

[tex]\Delta v=-2-0=-2\ m.s^{-1}[/tex]

[tex]\Delta a=-14-10=-24\ m.s^{-1}[/tex]

Explanation:

The equation governing the position of the particle moving along x-axis is given as:

[tex]x=5\times t^2-4\times t^3[/tex]

we know that the time derivative of position gives us the velocity:

[tex]\frac{d}{dt} x=v[/tex]

[tex]v=10\ t-12\ t^2[/tex]

and the time derivative of of velocity gives us the acceleration:

[tex]\frac{d}{dt} v=a[/tex]

[tex]a=10-24\ t[/tex]

Now, when t = 0

[tex]x=0\ m[/tex]

[tex]v=0\ m.s^{-1}[/tex]

[tex]a=10\ m.s^{-2}[/tex]

When t=1 s

[tex]x_1=5\times 1^2-4\times 1^3=1\ m[/tex]

[tex]v_1=10\times 1-12\times 1^2=-2\ m.s^{-1}[/tex]

[tex]a_1=10-24\times 1=-14\ m.s^{-2}[/tex]

Hence,

Displacement between the stipulated time:

[tex]\Delta x=x_1-x[/tex]

[tex]\Delta x=1-0=1\ m[/tex]

Velocity between the stipulated time:

[tex]\Delta v=v_1-v[/tex]

[tex]\Delta v=-2-0=-2\ m.s^{-1}[/tex]

Acceleration between the stipulated time:

[tex]\Delta a=a_1-a[/tex]

[tex]\Delta a=-14-10=-24\ m.s^{-1}[/tex]

Here negative sign indicates that the vectors are in negative x direction.