A 5.0kg rock whose density is 4800 kg/m3 is suspended bya string such that half of the rock's volume is under water. What is the tension in the string?

Answer:

Constructive Interference.

Explanation:

Constructive Interference.

Definition:

Two waves meet in such a way their highs(Crests) combine to form a new waves whose magnitude is the sum of magnitude of combining waves.

Since two waves have same wavelength and are in phase so when they combine they well form a way which has the magnitude equal to the sum of the magnitude of both waves.

Reasons why it is Constructive Interference:Waves

Answer:

Down

       F1ₓ = 219.6N

       [tex]F1_{y}[/tex]  = 1038.8 N

Top

       F2ₓ = 219.6 N

       [tex]F2_{y}[/tex] = 0  

Explanation:

For this exercise we must make a free body diagram of the ladder, see attached, then use the balance equations on each axis

Transnational Balance

X axis

        F1ₓ -F2ₓ = 0

        F1ₓ = F2ₓ

Y Axis  

         [tex]F1_{y}[/tex] -  [tex]F2_{y}[/tex] - W - W_man = 0           (1)

Rotational balance

The reference system is placed at the bottom of the stairs and we can turn the anti-clockwise direction of rotation as positive

           F2ₓ y - [tex]F2_{y}[/tex] x - W x - W_man x_man = 0

Let us write the data they give, the masses of the ladder (m = 14.0 kg), the mass of man (m_man = 92 kg), the center of mass of the ladder that is 2m from the bottom (the height) and the position of the man which is 3 m high

Let's look with trigonometry for distances

The angle of the stairs is

           cos θ = x / L

           θ = cos⁻¹ x / L

           θ = cos⁻¹ 2 / 5.6

           θ = 69⁰

Height y

          tan 69 = y / x

          y = x tan 69

          y = 2 tan 69

          y = 5.21 m

Distance x

          tan 69 = 2 / x

          x = 2 / tan 69

          x = 0.7677 m

The distance x_man

          x_man = 3 / tan 69

          x_man = 1,152 m

They indicate that between the scalars and the support there is no friction so the vertical force at the top is zero

          [tex]F2_{y}[/tex] = 0

Let's replace in the translational equilibrium equation

         F2ₓ y - [tex]F2_{y}[/tex] x - W x - W_man x_man = 0

         F2ₓ 5.21 -0 - 14.0 9.8 0.7677 - 92.0 9.8 1,152 = 0

         F2ₓ = 1143.97 / 5.21

         F2ₓ = 219.6 N

We use equation 1

         [tex]F1_{y}[/tex] + 0 - W - W_man = 0

        [tex]F1_{y}[/tex] = W + W_man

        [tex]F1_{y}[/tex]  = (m + m_man) g

         [tex]F1_{y}[/tex]  = (14 +92) 9.8

         [tex]F1_{y}[/tex]  = 1038.8 N

We can write the force on each part of the ladder

Down

       F1ₓ = 219.6N

       [tex]F1_{y}[/tex]  = 1038.8 N

Top

       F2ₓ = 219.6 N

       [tex]F2_{y}[/tex] = 0  

To solve this problem we will apply the laws of proportion between the resistance / weight ratio that may occur depending on the cases mentioned. The strength-to-weight ratio for each object is,

For the nano tube,

[tex]\frac{S}{W} = \frac{1}{10*10^{-9}} =1*10^{8}[/tex]

For the leg of a flea,

[tex]\frac{S}{W}= \frac{1}{100*10^{-6}}=10000[/tex]

For the elephant,

[tex]\frac{S}{W} = \frac{1}{2}= 0.5[/tex]

From this we can conclude that the resistance / weight ratio of the nano tube is 10 thousand times better than the flea's leg and [tex]10 ^ 8[/tex] times better than the elephant's leg.

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

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:

141.87 kg.

Explanation:

Deduction From Newton's second law of motion.

F = ma....................... Equation 1

Where F = Force acting on the object, m = mass of the object, a = acceleration  of the object.

Making m the subject of the equation,

m = F/a .................. Equation 2

But

a = (v-u)/t............... Equation 3

Where v = final velocity, u = initial velocity, t = time.

Given: v = 107 m/s, u = 0 m/s ( fro rest), t = 2.3 s.

Substituting into equation 3

a = (107-0)/2.3

a = 107/2.3

a = 46.52 m/s².

Also Given, F = 6600 N

Substitute into equation 2

m = 6600/46.52

m = 141.87 kg.

Hence the mass of the object = 141.87 kg.

Final answer:

Determining if a friction force is required for a car rounding a banked curve depends on the car's speed relative to the curve's ideal speed. At 95 km/h, a frictional force may be needed if this speed is not the ideal speed for the 68 m radius curve banked at 16 degrees.

Explanation:

When a 1100 kg car rounds a curve of radius 68 m banked at an angle of 16 degrees, we need to determine if a friction force is required when the car is traveling at 95 km/h. If the car is traveling at the correct banked curve speed, it could complete the turn without any frictional force. However, if the car travels at a speed higher or lower than this optimal speed, a frictional force will be necessary either to prevent the car from slipping outward or to prevent it from falling inward towards the center of the curve.

To find out whether a friction force is needed, we first need to calculate the ideal speed for this banked turn. This involves calculating the speed at which the components of the normal force provide enough centripetal force for the turn. The ideal speed is reached when no friction force is needed to keep the car on the path, meaning the force of gravity, the normal force, and the centripetal force are in perfect balance.

However, if the car is indeed traveling at 95 km/h, faster or slower than this ideal speed, then either a static frictional force acting upwards along the bank or a static frictional force opposite to the car's direction would be required to maintain its circular path without slipping.

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.

Answer:

2. VA

Explanation:

The valency electron or outer electron of a neutral atom of an element determines the group at which an element belong. The electronic configuration of an atom that have valency of 5 can be represented as 2 5 ,  2 8 5 etc.

The electronic configuration 2 5 represent Nitrogen atom while 2 8 5 represent phosphorus atom. The valency 5 depicts the element belongs to group 5A(VA).

This means atoms of valency electron of 3 belong to group IIIA, valency electrons of 4 belongs to group IVA, valency electron of 6 belong to group VIA  and valency electrons of  7 belong to group VIIA.  

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:

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

The ratio of the electric force on the proton after the wire segment is shrunk to three times its original length to the force before the segment was shrunk is 3.

The electric force between a point charge and a segment of wire with a distributed charge is given by Coulomb's law.

The formula for the electric force on a point charge q due to a segment of wire with charge Q distributed along its length L is:

[tex]F=\frac{k.q.Q}{L}[/tex]

where:

F is the electric force on the point charge,  

k is Coulomb's constant ( 8.988 × 1 0⁹ Nm²/ C²),

q is the charge of the point charge,  

Q is the charge distributed along the wire segment, and

L is the length of the wire segment.

When the wire segment is shrunk to one-third of its original length, the new length becomes 1/3 L.

The charge distribution remains the same, only the length changes.

So, the new electric force [tex]F_f[/tex] ​ on the proton after the segment is shrunk becomes:

[tex]F_f=\frac{k.q.Q}{\frac{1}{3}L}[/tex]

The original electric force [tex]F_i[/tex]​ on the proton before the segment was shrunk is:

[tex]F_i = \frac{k.q.Q}{L}[/tex]

let's find the ratio [tex]\frac{F_f}{F_i}[/tex] ​:

[tex]\frac{F_f}{F_i}=\frac{\frac{k.q.Q}{\frac{1}{3}L}}{\frac{k.q.Q}{L}}[/tex]

[tex]\frac{F_f}{F_i}=3[/tex]

Hence,  the ratio of the electric force on the proton after the wire segment is shrunk to the force before the segment was shrunk is 3.

To learn more on Electric force click here:

https://brainly.com/question/31696602

#SPJ12

The ratio of the electric force on the proton after the wire segment is shrunk is equal to the ratio of their charges.

The ratio of the electric force on the proton after the wire segment is shrunk to the force before the segment was shrunk can be found using Coulomb's law. Coulomb's law states that the electric force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

In this case, the charges involved are the charge of the wire segment and the charge of the proton. Since the wire segment contains 10 nC of charge, we can consider it as one of the charged objects. The proton is very far from the wire, so we can assume that the distance between them remains the same before and after the wire segment is shrunk. Therefore, the ratio of the electric force on the proton after the segment is shrunk to the force before the segment was shrunk is equal to the ratio of their charges.

Let's assume that the initial force on the proton is Fi and the final force on the proton is Ff. Using the given information, we have:

Fi = k(q1 * q2) / r^2

where k is the electrostatic constant, q1 and q2 are the charges of the wire segment and the proton respectively, and r is the distance between them.

After the wire segment is shrunk to one-third of its original length, the charge of the wire segment remains the same and the distance between the wire segment and the proton also remains the same. Therefore, the ratio Ff/Fi can be calculated as:

Ff/Fi = (q1 * q2) / (q1 * q2) = 1

Answer:

The planet´s orbital period will be one-half Earth´s orbital period.

Explanation:

The planet in orbit, is subject to the attractive force from the sun, which is given by the Newton´s Universal Law of Gravitation.

At the same time, this force, is the same centripetal force, that keeps the planet in orbit (assuming to be circular), so we can put the following equation:

Fg = Fc ⇒ G*mp*ms / r² = mp*ω²*r

As we know to find out the orbital period, as it is the time needed to give a complete revolution around the sun, we can say this:

ω = 2*π / T (rad/sec), so replacing this in the expression above, we get:

Fg = Fc ⇒   G*mp*ms / r² = mp*(2*π/T)²*r

Solving for T²:

T² = (2*π)²*r³ / G*ms (1)

For the planet orbiting the sun in Andromeda, we have:

Ta² = (2*π)*r³ / G*4*ms (2)

As the radius of the orbit (distance to the sun) is the same for both planets, we can simplify it in the expression, so, if we divide both sides in (1) and (2), simplifying common terms, we finally get:

(Te / Ta)² =  4  ⇒ Te / Ta = 2 ⇒ Ta = Te/2

So, The planet's orbital period will be one-half Earth's orbital period.

The planet´s orbital period should be considered as the one-half Earth´s orbital period.

It is subjected to the attractive force from the sun that we called as the

Newton´s Universal Law of Gravitation.

Also, the following equation should be used

Fg = Fc ⇒ G*mp*ms / r² = mp*ω²*r

Now

ω = 2*π / T (rad/sec),

So,

Fg = Fc ⇒   G*mp*ms / r² = mp*(2*π/T)²*r

Now

T² = (2*π)²*r³ / G*ms (1)

And,

Ta² = (2*π)*r³ / G*4*ms (2)

So,

(Te / Ta)² =  4  ⇒ Te / Ta = 2 ⇒ Ta = Te/2

Learn more about planet here: https://brainly.com/question/20893131

To solve this problem we will use the work theorem, for which we have that the Force applied on the object multiplied by the distance traveled by it, is equivalent to the total work. From the measurements obtained we have that the width and the top are 14ft and 7ft respectively. In turn, the bottom of the tank is 15ft. Although the weight of the liquid is not given we will assume this value of [tex] 62 lb / ft ^ 3 [/tex] (Whose variable will remain modifiable until the end of the equations subsequently presented to facilitate the change of this, in case be different). Now the general expression for the integral of work would be given as

[tex]W = \gamma A * \int_0^15 dy[/tex]

Basically under this expression we are making it difficult for the weight of the liquid multiplied by the area (Top and widht) under the integral of the liquid path to be equivalent to the total work done, then replacing

[tex]W = (62)(14*7)\int^{15}_0 (15-y)dy[/tex]

[tex]W = (14*7*62)\big [15y-\frac{y^2}{2}\big ]^{15}_0[/tex]

[tex]W = (14*7*62)[15(15)-\frac{(15)^2}{2}][/tex]

[tex]W = 683550ft-lbs[/tex]

Therefore the total work in the system is [tex]683550ft-lbs[/tex]

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

To solve this problem we will apply the concepts related to the electric field such as the smelting of the Force and the load (In this case the force is equivalent to the weight). Later we will apply the ratio of the total charge as a function of the multiplication of the number of electrons and their individual charge.

[tex]E = \frac{mg}{q}[/tex]

Here,

m = mass

g = Acceleration due to gravity

Rearranging to find the charge,

[tex]q = \frac{mg}{E}[/tex]

Replacing,

[tex]q = \frac{(3.37*10^{-9})(9.8)}{11000}[/tex]

[tex]q = 3.002*10^{-12}C[/tex]

Since the field is acting upwards the charge on the drop should be negative to balance it in air. The equation to find the number of electrons then is

[tex]q = ne[/tex]

Here,

n = Number of electrons

e = Charge of each electron

[tex]n = \frac{q}{e}[/tex]

Replacing,

[tex]n = \frac{3.002*10^{-12}}{1.6*10^{-19}}[/tex]

[tex]n = 2.44*10^7[/tex]

Therefore the number of electrons that reside on the drop is [tex]2.44*10^7[/tex]

To determine the number of excess electrons or protons residing on the water drop, we can use the principle of electrostatics. When an electric field is applied to a charged object, the electrostatic force acting on it can be calculated using the equation:

[tex]F = qE[/tex]

Where:

F is the electrostatic force

q is the charge on the object

E is the electric field strength

In this case, the electrostatic force acting on the water drop is balanced by the gravitational force, so we have:

F = mg

Where:

m is the mass of the water drop

g is the acceleration due to gravity

We can equate these two forces and solve for the charge q:

qE = mg

From this equation, we can isolate the charge q:

q = mg / E

Now we can calculate the charge on the water drop:

m = 3.37 × 10^(-9) kg

g = 9.8 m/s^2

E = 11000 N/C

Substituting the values into the equation:

q = (3.37 × 10^(-9) kg * 9.8 m/s^2) / 11000 N/C

Calculating this expression:

q = 3.037 × 10^(-15) C

The elementary charge of an electron or proton is approximately 1.602 × 10^(-19) C. To find the number of excess electrons or protons, we can divide the calculated charge by the elementary charge:

Number of excess electrons or protons = q / elementary charge

Number of excess electrons or protons = (3.037 × 10^(-15) C) / (1.602 × 10^(-19) C)

Calculating this expression:

Number of excess electrons or protons ≈ 1.895 × 10^(4)

Therefore, the water drop has approximately 18,950 excess electrons or protons.

Learn more about electric field on:

https://brainly.com/question/14557875

#SPJ6

Answer:

6250 m  

Explanation:

When an object is projected into the air, the distance along the horizontal direction is called the Range.

The Range of a projectile is expressed as;

                                   [tex]R = \frac{u^{2}sin2\alpha }{g}[/tex]

Where,

R is the range of the projectile

α is the angle of inclination with the horizontal

g is the acceleration due to gravity = 9.8 m/s ≈ 10 m/s

Given; α =45° , u = 250 m/s

                                [tex]R = \frac{250^{2}sin2(45)}{10}[/tex]

                                [tex]R = \frac{62500sin90}{10}[/tex]

                                [tex]R = \frac{62500}{10}[/tex]

                                R =  6250 m

The range is 6250 m                              

In a projectile motion, the given object travel 6377.55 m in the horizontal direction.

In a projectile motion, the distance of the object along the horizontal direction is called the Range.  

The Range of a projectile                    

[tex]\bold {R = \dfrac {u^2 sin2\alpha }{g}}[/tex]

Where,  

R - range of the projectile

u - initial speed = 250 m/s  

α - angle of inclination with the horizontal = 45°  

g - gravitational acceleration = 9.8 m/s  

Put the values in the formula,

[tex]\bold {R = \dfrac {(250)^2 sin2(45) }{9.8}}\\\\\bold {R = \dfrac {62500\ sin 90 }{9.8}}\\\\\bold {R =6377.55}[/tex]  Since, sin 90 = 1

Therefore, in a projectile motion, the given object travel 6377.55 m in the horizontal direction.

To know more about projectile motion,  

https://brainly.com/question/11049671                                                              

Answer:

52.47706 mph

54.5 mph

Explanation:

The average speed is given by

[tex]V_{av}=\dfrac{Distance}{Time}[/tex]

[tex]V_{av}=\dfrac{100}{\dfrac{50}{44}+\dfrac{50}{65}}\\\Rightarrow V_{av}=52.47706\ mph[/tex]

Julie's average speed on the way to Grandmother's house is 52.47706 mph

[tex]V_{av}=\dfrac{44+65}{2}\\\Rightarrow V_{av}=54.5\ mph[/tex]

Average speed on the return trip is 54.5 mph

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:

F1 = 1210.65 N

Q = 65.7081 degrees

Explanation:

Sum of Forces in x - direction:

F1 * cos (Q) + F2*sin(30) - F3*(3/5) = Fres*cos (theta)

F1 * cos (Q) + (500)*(0.5) - 450*(3/5) = 570*cos(33)

F1*cos (Q) = 498.0422237 N    .... Eq1

Sum of Forces in y - direction:

F1 * sin (Q) - F2*sin (60) - F3 * (4/5) =  Fres*sin (theta)

F1 * sin (Q) - 500*sin(60) - 450 * (4/5) =  570*sin (33)

F1 * sin (Q) = 1103.45692 N  .... Eq 2

Divide Eq 2 by Eq 1

tan (Q) = 2.21558916

Q = arctan (2.21558916) = 65.7081 degrees

F1 = 1210.65 N

Answer:

Electric Field is [tex]5.943801*10^6 N/C[/tex]

Explanation:

Electric Field:

It originates from positive charge and ends at negative charge.

General Formula for electric Field:

[tex]E=\frac{kq}{r^2}[/tex]

where:

k is the Coulomb Constant

q is the charge

r is the distance

Given:

q=7.20 mC

r=3.3 meters

k=[tex]8.99*10^9 N.m^2/C^2[/tex]

Find:

Electric Field=?

Solution:

[tex]E=\frac{kq}{r^2}[/tex]

[tex]E=\frac{(8.99*10^9)(7.20*10^{-3})}{3.3^2}\\E=5943801.653 N/C\\E=5.943801653*10^6 N/C[/tex]

Electric Field is [tex]5.943801*10^6 N/C[/tex]

Answer with Explanation:

We are given that

Mass , m=372 g=[tex]\frac{372}{1000}=0.372 Kg[/tex]

1 kg=1000g

Maximum acceleration, a=[tex]17.6 m/s^2[/tex]

Maximum speed ,v=1.75 m/s

a.We know that

Maximum acceleration, a=[tex]A\omega^2[/tex]

Maximum speed, v=[tex]\omega A[/tex]

[tex]17.6=A\omega^2[/tex]

[tex]1.75=A\omega[/tex]

[tex]\frac{17.6}{1.75}=\frac{A\omega^2}{A\omega}=\omega[/tex]

Angular frequency,[tex]\omega=10.06 rad/s[/tex]

b.Substitute the value of angular frequency

[tex]1.75=A(10.06)[/tex]

[tex]A=\frac{1.75}{10.06}=0.17 m[/tex]

Hence, the amplitude=0.17 m

c.Spring constant,k=[tex]m\omega^2[/tex]

Using the formula

[tex]k=0.372\times (10.06)^2[/tex]

Hence, the spring constant,k=37.6 N/m

Final answer:

The angular frequency is approximately 7.686 rad/s, the amplitude is approximately 0.227 m, and the spring constant is approximately 6.5472 N/m.

Explanation:

To determine the angular frequency, we can use the formula:

ω = √(k/m)

where ω is the angular frequency in radians per second, k is the spring constant in Newtons per meter, and m is the mass in kilograms.

Given that the maximum acceleration is 17.6 m/s^2 and the mass is 372 g (or 0.372 kg), we can calculate the spring constant:

k = m * a

k = 0.372 kg * 17.6 m/s^2 = 6.5472 N/m

Now we can find the angular frequency:

ω = √(6.5472 N/m / 0.372 kg) ≈ 7.686 rad/s

To determine the amplitude, we can use the formula:

A = vmax / ω

where A is the amplitude, vmax is the maximum speed, and ω is the angular frequency.

Given that the maximum speed is 1.75 m/s and the angular frequency is 7.686 rad/s, we can calculate the amplitude:

A = 1.75 m/s / 7.686 rad/s ≈ 0.227 m

Therefore, the angular frequency is approximately 7.686 rad/s, the amplitude is approximately 0.227 m, and the spring constant is approximately 6.5472 N/m.

Answer:

None of the above

Explanation:

When energy is converted from one form to another in a chemical or physical change, none will change. This is due to the law of conservation of energy. It states that the total energy of the system remains constant. It only changes energy from one form of energy to another. So, the correct option is (d) "none of the above".

Answer: None of the above

Explanation:

The total mass of a system does not change during normal (non-nuclear) chemical reactions or during other processes where energy changes form. The force of gravity is constant and will not change when energy is converted. While energy can be converted between forms or exchanged between species, no additional energy can be created or removed.

Answer:

r = 0.78 m

Explanation:

If the sound source is emitting the signal evenly in all directions (as from a point source) this means that at any time, the source power is distributed over the surface of a sphere of radius r.

At a distance r of the source, the intensity of the sound is defined as the power per unit area:

I = P/A

As the area is the area of a sphere, we can say the following:

I = P / 4*π*r²

Replacing I and P by the values given, we can solve for r (which is the distance from the listener to the source) as follows:

r² = P / I*4*π ⇒ r = [tex]\sqrt{P/(4*\pi*I)}[/tex] = 0.78 m

The distance between you and the source is 0.78 m.

The given parameters:

The area of the source is calculated as follows;

[tex]A = \frac{P}{I} \\\\ A = \frac{75}{9.8} \\\\ A = 7.65 \ m^2[/tex]

The distance between you and the source is calculated as follows;

[tex]A = 4\pi r^2\\\\ r^2 = \frac{A}{4\pi} \\\\ r = \sqrt{\frac{A}{4\pi}} \\\\ r = \sqrt{\frac{7.65}{4\pi}} \\\\ r = 0.78 \ m[/tex]

Learn more about intensity of sound here: https://brainly.com/question/4431819

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.

Answer:

we can estimate the _time__.

The three things are;

1. Moon's position in the sky

2. The moon phase

3. The time

Explanation:

In general, knowing any two of the following three things; (the moon's position in the sky, the moon phase, and the time) will allows us to estimate the third. Yes, this statement is true because, position and phase of moon is used to determine the hour of the day and night most especially in the morning. Example of this is the determination of prayer time by Muslims community as it was the major time determinant in the past before the advent of clock or watch.

Also, if will know the time and moon position, we can determine the phase of the moon likewise using time and moon phase to know the moon position.

The different phases of the moon cause changes in the size of the moon. If we know the moon's position in the sky and its phase. we can easily estimate the time.

The moon changes shape every day. This is due to the fact that the celestial body has no light of its own and can only reflect sunlight.

Only the side of the moon facing the sun can reflect this light and seem bright. The opposite side appears black. this is a full moon.

We can only see the black section when it lies between the sun and the earth when a new moon occurs. We witness intermediate phases like a half-moon and crescent in between these two extremes.

In general, we may estimate the third by knowing any two of the following three things

(1) the moon's position in the sky

(2) the moon phase

(3) the time

Yes, this statement is correct since the moon's location and phase are utilized to define the time of day and night, particularly in the morning.

Also, if we know the time and moon position, we can figure out the moon phase by utilizing the time and moon phase to figure out the moon position.

Hence If we know the moon's position in the sky and its phase. we can easily estimate the time.

To learn more about the moon's phase refer to the link;

https://brainly.com/question/2285324

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:

Integrated circuit (IC)

Explanation:

An integrated circuit ( IC ) is a semiconductor which contains multiple electronic components

interconnected to form a complete electronic function. Integrated circuits are the most essential part of all electronic products.

Modern integrated circuits contain as much as billions of circuit components such as transistors , diodes , resistors , and capacitors

onto a single monolithic die .

The correct answer is option b. An Integrated Circuit (IC), or microchip, is a small electronic component consisting of transistors and miniaturized parts etched onto a piece of silicon, pivotal in the development and miniaturization of electronic devices

The small electronic component made up of transistors (tiny switches) and other miniaturized parts is called an Integrated Circuit (IC). An Integrated Circuit, sometimes referred to as a microchip, is an electronic circuit of transistors etched onto a small piece of silicon. This technology allows for complex circuitry to be compacted into a tiny chip, which is crucial for the functionality of modern electronic devices like computers and cell phones. The invention of the IC was pivotal in launching the modern computer revolution because it significantly reduced the size and complexity of electronic devices, replacing bulky vacuum tubes and complicated wiring with a compact, efficient solution.

Integrated Circuits are designed to handle both analog and digital signals, but in the realm of digital electronics, they are essential for managing binary code, the series of ones and zeroes that computers use to process data. This is achieved through the hundreds, thousands, or even millions of transistors that can act as on-off switches within a single IC. The miniaturization and efficiency of ICs have been fundamental in advancing the technological capabilities of electronic devices, making them smaller, faster, and more accessible to the general public.

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

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