1. As telescopes improve, astronomers are able to detect planets orbiting other stars. One such planet orbits its star at a distance of 2.897 x 109 km. (This is far enough from the star that radius of the star can be ignored.) The star has 1.9 times the mass of our sun (msun = 2 x 1030 kg). If the planet has a mass of 5.4 x 1027 kg, what is the force of gravity it experiences

The final velocity of the car A after collision is 1.884 m/s.

Explanation:

As per law of conservation of energy, the momentum of objects before collision is tend to be same for the momentum of objects after collision, in case of elastic collision.

So, from those equation, we can derive the final velocities for both the objects after collision.

[tex]v_{1} = \frac{m_{1}- m_{2} }{m_{1} + m_{2} } u_{1}+ \frac{ 2*m_{2} }{m_{1} + m_{2} } u_{2}[/tex]

[tex]v_{2} = \frac{2*m_{1} }{m_{1} + m_{2} } u_{1}+ \frac{ m_{2}- m_{1} }{m_{1} + m_{2} } u_{2}[/tex]

So if we consider the car A is having a mass m1 which is equal to 281 mc kg with initial velocity before collision as u1 = 2.82 m/s. And then the car B will be having the mass m2 equal to 209 mc kg with the velocity of 1.72 m/s. So if the final velocity of car A after collision is required to determine then we have to solve the formula for v1

[tex]v_{1} = \frac{m_{1}- m_{2} }{m_{1} + m_{2} } u_{1}+ \frac{ 2*m_{2} }{m_{1} + m_{2} } u_{2}[/tex]

[tex]v_{1} = \frac{281- 209 }{281 + 209} } * 2.82+ \frac{ 2*209 }{281+209}*1.72[/tex]

[tex]v_{1} = \frac{72 }{490} } * 2.82+ \frac{ 418 }{490}*1.72[/tex]

[tex]v_{1} = 0.414+1.47=1.884[/tex]

So the final velocity of the car A after collision is 1.884 m/s.

Answer:A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. The loudness of sound produced depends upon Amplitude of vibration.

Explanation:

The loudness of a sound depends upon the amplitude of vibrations. A sound will be louder if the amplitude of vibration is greater but if it is smaller than sound will not be louder.

Now it is the vibration of a sound that determines it's amplitude. Amplitude signifies the maximum distance moved. It means the extent of vibration If is vibrations have more amplitude than sound will be louder but if the amplitude of vibrations is shorter than the sound will be softer.

The loudness of sound produced depend on the frequency of oscillation, the amplitude of oscillation, the kinetic energy of oscillation

Explanation:

Loudness of an instrument is proportional to its amplitude

The  amplitude ,frequency of the sound wave will be a function of both the speed and the amplitude of the cone.( i.e. keep the amplitude constant and vary the kinetic energy of the oscillation of the speaker cone and the frequency will change. )

If you step slowly into a pool, the ripples you make are reasonably small, whereas if you take a running jump (i.e. high kinetic energy).

Answer:

The Tenth Amendment

Explanation:

It supports states rights. it is apart of the "bill of rights". it expresses the federalism and state rights. It explains the the United states of Government is made this amendments to protect do the state rights. What people want.

Answer:

Explanation:

The picture shows a crushed can inside a bowl with iced water.

This experiment consists on pouring a small amount of water inside a can, heating the can directly on a kitchen burner, using a heat insulating clamp, and placing the can with the open end face down in a bowl with iced water.

The particles inside the can, when heated on the kitchen burner will expand, since the heat supplied increases the kinetic energy of the particles vigorously. Since the can is open, the pressure inside the can equals the pressure outside the can (the atmospheric pressure).

When the can is put face down in contact with the iced water, the air inside the can will cool down rapidly, causing the pressure (according to Boyle's law) to decrease quickly.

Now, there will be a huge difference between the atmospheric pressure and the pressure inside the can, which will generate a net force pointing radially toward the can strong enogh to crush the can.

Answer:

D

Explanation:

You need to pull a special "lever" to let the handicapp ramp out and it uses a wedge to push itself out

C: pair of scissors

- this is because the blades on a pair of scissors would identify as the wedge

- and the grip part of the scissors would be the lever.

Answer:

Initial angular position of the disc is 3 radian

Explanation:

As we know that the angular acceleration of the disc is given as

[tex]\alpha = 0.50 rad/s^2[/tex]

initial angular speed is given as

[tex]\omega = 1 rad/s[/tex]

now we know that angular displacement of the disc is given as

[tex]\theta = \omega t + \frac{1}{2}\alpha t^2[/tex]

[tex]\theta = 1(2) + \frac{1}{2}(0.5)(2^2)[/tex]

[tex]\theta = 3 rad[/tex]

now we have

[tex]\theta_f - \theta_i = 3 rad[/tex]

[tex]6 rad - \theta_i = 3[/tex]

[tex]\theta_i = 3 ard[/tex]

Final answer:

To find the initial angular position of the disk, we used the kinematic equation for rotational motion and the given values (angular acceleration, initial angular velocity, and final angle) to calculate that the disk's angular position when the acceleration started was 3.0 rad.

Explanation:

The problem is asking us to find the angular position of the disk when it started accelerating. Since we know the angular acceleration, the initial angular velocity, and the final angular position, we can use the kinematic equations for rotational motion to determine the initial angular position.

The kinematic equation we'll use is:
[tex]\( \theta = \theta_0 + \omega_0t + \frac{1}{2}at^2 \)[/tex],
where [tex]\(\theta\)[/tex] is the final angular position,[tex]\(\theta_0\)[/tex] is the initial angular position, [tex]\(\omega_0\)[/tex] is the initial angular velocity, [tex]\(a\)[/tex] is the angular acceleration, and [tex]\(t\)[/tex] is the time.

Given:
[tex]\(\theta = 6.0 \text{ rad} \)[/tex] (final angular position),
[tex]\(\omega_0 = 1.0 \text{ rad/s} \)[/tex] (initial angular velocity),
[tex]\(a = 0.50 \text{ rad/s}^2 \)[/tex] (angular acceleration), and
[tex]\(t = 2 \text{ s} \)[/tex] (time).
We rearrange the equation to solve for [tex]\(\theta_0\)[/tex]:
[tex]\(\theta_0 = \theta - \omega_0t - \frac{1}{2}at^2 \)[/tex]

Plugging in the values:
[tex]\(\theta_0 = 6.0 \text{ rad} - (1.0 \text{ rad/s} \cdot 2 \text{ s}) - \frac{1}{2} \cdot 0.50 \text{ rad/s}^2 \cdot (2 \text{ s})^2 \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 0.50 \cdot 2 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 1.0 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 3.0 \text{ rad} \)[/tex]
So the disk's angular position when the acceleration started was 3.0 rad.

The work done on the barbell is -165.62 Nm.

Explanation:

Work done on any object is the measure of force required to move that object from one position to another. So it is determined by the product of force acting on the object with the displacement of the object.

In the present problem, the displacement of the object on acting of force is given as 1.3 m. And the weight of the object which is a barbel is given as 13 kg. As the work is to lift the object from the ground, so the acceleration due to gravity will be acting on the object. In other words, the force applied on the object to lift it should be in opposite direction to the acting of acceleration due to gravity.

Thus, [tex]Force = - Mass * Acceleration due to gravity = - 13 * 9.8 =-127.4 N[/tex]

Now, the force is -127.4 N and the displacement is 1.3 m.

So, [tex]Work done = F*d[/tex]

[tex]Work done = -127.4* 1.3 = -165.62 Nm[/tex]

So, the work done on the barbell is -165.62 Nm.

After 2 seconds the particle will be in position

[tex]x(2)=10+12\cdot 2^2=10+12\cdot 4=10+48=58[/tex]

After 5 seconds the particle will be in position

[tex]x(5)=10+12\cdot 5^2=10+12\cdot 25=10+300=310[/tex]

So, the particle will travel

[tex]310-58=252[/tex]

meters in 3 seconds, for an average speed of

[tex]\dfrac{252}{3}=84[/tex]

Final answer:

The average speed of the particle between t = 2s and t = 5s, using the function x = 10 + 12t^2, is calculated by finding the total distance traveled in that time frame and dividing it by the time elapsed, which gives an average speed of 84 m/s. So the correct option is C.

Explanation:

To find the average speed of a particle between time t = 2s and t = 5s using the equation x = 10 + 12t2, we need to calculate the total distance travelled by the particle over that time period and then divide by the total time elapsed.

Therefore, the correct answer is C. 84 ms-1.

Final answer:

A species is a group of individual organisms that have similar characteristics they pass to their offspring, can interbreed, and produce fertile offspring. These characteristics can include adaptations to their environment and shared physical traits.

Explanation:

The group of animals you are referring to is known as a species. A species is a group of individual organisms that interbreed and produce fertile, viable offspring. They share genetic characteristics that are passed along to their offspring, ensuring they belong to the same species and exhibit similar features such as body size and shape. Members of a species often share adaptations that enhance survival and reproduction within their environment. When observing a species, it's clear that offspring are not exact replicas of their parents but rather a blend of their traits, showing continuous variation. The concept of species is fundamental in understanding biological diversity and the process of inheritance.

For example, all humans belong to the species Homo sapiens and children inherit a combination of traits from their parents. This same principle applies across various animal species, indicating the shared process of genetic transmission and reproduction.

Answer:

A few examples of acceleration are the falling of an apple, the moon orbiting around the earth, or when a car is stopped at the traffic lights. Through these examples, we can understand that when there is a change in the direction of a moving object or an increase or decrease in speed, acceleration occurs. Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.

Explanation:

Acceleration can be caused by a hill, wind, water movement, and a stop light.

The options that would most likely cause acceleration are a hill, wind, water movement, and a stop light.

A hill causes acceleration when an object rolls down due to the force of gravity. Wind can cause acceleration if it pushes an object. Water movement can cause acceleration if it exerts a force on an object. Finally, a stop light can cause acceleration when a car goes from a stationary position to moving quickly when the light turns green.

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Answer:

a.95J

b.90J

Explanation:

a.Applying energy conservation laws:-

Energy  Into Bulb=[tex]Light \ Energy+Thermal \ Energy(Heat \ Energy)[/tex]

Given  that light energy=5J,and Total Energy=100J

[tex]Heat \ Energy= \Total \ Energy- Light \ Energy\\=100J-5J=95J[/tex]

b. Applying the laws in a above.

Total Energy=100J

Light Energy=10J

[tex]Heat \ Energy=100J-10J=90J[/tex]

The amount of property that is needed by a body or an object to work is called energy. It is conserved and can only be transferred from one object to another. It is estimated in Joules, calories or kW -h.

The energy that leaves the lamp is a. 95 J and b. 90J.

This can be estimated as:

a. According to the conservational law of energy:

[tex]\rm Energy \;in \;the\; bulb = Light \;Energy + Heat\; Energy[/tex]

Given,

Substituting values in the equation:

[tex]\begin{aligned}\text{ Heat Energy} &= \text{Total Energy - Light Energy} \\&= 100 - 5 \\&= 95 \text{J} \end{aligned}[/tex]

b. Applying the same law:

Given,

Substituting values:

[tex]\begin{aligned} \text{Heat Energy } & = 100 - 10 \\& = 90 \text{J} \end {aligned}[/tex]

Therefore, energies released are a. 95 J and b. 90J.

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Answer:

Moving water

Ice and glaciers

humans and animals

Explanation:

Erosion is the removal of weathered materials from the surface of earth. It is one of the processes that sculpts the surface of the earth due to its unique earth moving capabilities.

The main agents that contribute to erosion include water, wind, ice(glaciers), and gravity. They each shape the earth's landscape in distinct ways such as through water erosion, wind erosion, glacial erosion, and erosion caused by gravity.

There are several agents that significantly contribute to erosion, a common geologic process. The main agents of erosion include water, wind, ice(glaciers), and gravity. Water erosion occurs when moving water such as rain, rivers, or ocean waves wear down the earth's surface. Wind erosion happens especially in dry, bare areas where loose soil can be easily picked up by the wind. A glacier's movement can erode the land through a process called glacial erosion. Lastly, gravity contributes to erosion through landslides and rockfalls, where rocks and soil are pulled down by gravity. Each of these agents shape the earth's landscape in different ways.

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Answer:73.47kg approximately

Explanation:

Weight(w)=720N

Acceleration due to gravity(g)=9.8m/s^2

Mass(m)=?

Mass=w/g

Mass=720/9.8

Mass=73.47kg approximately

To determine the mass of an object with a weight of 720 N, use the formula w = mg and divide the weight by Earth's gravitational acceleration, yielding a mass of 73.47 kilograms.

To find the mass of an object that weighs 720 N on the surface of Earth, we can use the formula for weight, which is w = mg, where w is weight in newtons, m is mass in kilograms, and g is the acceleration due to gravity in meters per second squared (m/s²). On Earth, g = 9.80 m/s².

Starting with the weight equation:

Therefore, the mass of the object on Earth is 73.47 kilograms.

Answer:the awnser is c

Explanation:

Awnser

Answer:

C

Explanation:

Answer:

Explanation:

There are three kinds of heat transfer: conduction, convection, and radiation.

Conduction is the heat transfer by direct contact of a hot object with a cold object. It is transmitted by the vibration of the particles and not by translation motion. That is not what it is shown: the clouds are not in direct contact with the ground.

Heat transfer by convection is result of the motion of the particles in fluis, like water or air: particles move from hotter regions where they have high kinetic energy to colder regions where the particles have lower kinetic energy. Since the hotter fluids have lower density than the colder fluids, there will be a continous movement of parciles and heat. That is what is shown in the figure with the arrows.

Radiation heat transfer mechanism always occur but is only important when the temperature of the hot object is really high, like in a fire, or in a resistance to red hot, or in the Sun. The heat is radiated by infrarred radiation. That is not what is shown in the figure.

The M and N represents the electrical and kinetic energy, respectively.

Explanation:

As the law of conservation of energy states that energy can neither be created nor be destroyed, it can only be transferred from one form of energy to another. So in the case of ceiling fan, the electrical energy which is used to switch on the fan, is transferred as the kinetic energy of the blades of the fan for its working. Thus, the energy transfer diagram will show the transfer of electrical energy to kinetic energy.

So, the M and N in the energy transfer diagram will represent electrical and kinetic energy, respectively.

Answer: c) N= electrical energy and M= kinetic energy

Explanation:

The options are:

a) N= electrical and M= potential energy

b) N=light energy and M= electrical energy

c) N= electrical energy and M= kinetic energy

d) N= mechanical energy and M= electrical energy

In the ceiling fan we have:

We have that for a ceiling fan:

When we turn it on, we allow electrical current to flow into the fan system.

That electrical current is used to move the blades of the fan, in this way creating a wind current. As you may know, the energy of the movement is called kinetic energy.

So we have that the conversion here is Electrical energy into Kinetic energy, so the correct option is c.

Answer:  Point A is the answer for the potential energy. Point D is the answer for the kinetic energy.

Explanation:

Answer:

point a and point d

Explanation:

2.72 N

Explanation:

Step 1:

From the basic formula in electrostatics

F = E * q

where F = Force due to charges

           E = Electric field strength

           q = Charge

Step 2:

From the given question

q= [tex]8.5*10^{-6} C[/tex]

E = [tex]3.2 * 10^{5} N/C[/tex]

F = [tex]8.5 * 10^{-6} * 3.2 * 10^{5} = 2.72[/tex] N

Answer:

B

Explanation:

E2020

Answer:

work = 0

Explanation:

Let's remember that work is defined as the product of a force by a distance. Distance is the physical path displaced by the body under the action of that force.

W = F * d

where:

W = work [J]

F = force [N]

d = distance [m]

In this case, the toy is held at a height, there is no displacement from one point to another. So there is no work and this is equal to zero.

W = (2*9.81) * 0 = 0 [Joules]

Answer:

NO work is done on or by the object

Explanation: I go to school

Answer:

Wave speed = 50 m[tex]s^{-1}[/tex]

Explanation:

Given

Wavelength = 5 m

Frequency = 10 Hz = 10 [tex]s^{-1}[/tex]

wave speed = ?

We know that all waves have same relationship among wavelength λ, frequency f and speed v , which is given by

   v = fλ

Therefore wave speed = 10 [tex]s^{-1}[/tex] x 5 m = 50 m[tex]s^{-1}[/tex]

Answer:

At the surface of the Atlantic Ocean

Explanation:

The atlantic ocean is a worm ocean and the surface has the least dense water. This is because the denser layer of water sinks, while the least dense floats.

The Atlantic Ocean stands out in the choices with warmer temperatures at depths. This results from the different flow dynamics in the semi-enclosed Mediterranean Sea.

Answer:

Global climate change is an average long-term changes over the entire Earth in temperature, weather etc.

Explanation:

Answer:

Flow rate of air is given as 83.33 cubic feet per minute

Explanation:

As we know that total volume of the air flow is given as

[tex]V = 10,000 cubic feet[/tex]

also we know that total time is

[tex]t = 2 hours = 120 min[/tex]

now we have flow rate given as

[tex]Q = \frac{V}{t}[/tex]

[tex]Q = \frac{10000}{120}[/tex]

[tex]Q = 83.3 cf/m[/tex]

Answer:

(A) conduction

Explanation:

parts of that are touching other parts and thus create heat!!!! dont lose that heat!

Answer:

The answer is convention.

Answer:

shuffling shoes

Explanation:

Answer:

The approximate terminal velocity of a sky diver before the parachute opens is 320 km/h.

Explanation:

                           Buoyancy force + drag force = Gravity

Answer:

Explanation:

You are expected to have some understanding of how these devices work. It is helpful to actually see one or take it apart.

Magnetic force is involved where there is a magnet or material that responds to a magnet.

Of course a compass aligns itself with the magnetic field of the earth.

A magnetic door catch uses a magnet or pair of magnets to attract a metal plate, holding the door closed.

A speaker uses the reaction between the magnetic field in a coil of wire and that of a fixed magnet to move the speaker cone. (There are versions of speakers that use electrostatic force (electric field), but those are less common.)

A motor moves by creating a magnetic field in the armature that reacts with one in the stator. The latter can be created by fixed magnets, or by an electric current.

__

Electric force is involved when the operation is a result of the attraction between oppositely charged particles.

An electronic air filter uses the attraction of charged particles to attract "dirt" in the air to a charged surface, so removing it from the air.

Socks from the dryer often cling to each other (static cling) because the charge they get from rubbing other dryer contents is not dissipated in the dry air. (Fabric softener can reduce this effect, presumably by making the materials more electrically conductive.)

Answer: F=3158N

Explanation:

Work is the product of force applied and the distance the object moves along the force applied. Work is measured in joules and the equation is as follows

W = F x d

So that F = W/d

F = 30000 J / 9.5m

F = ~3158 N

Final answer:

The applied force can be found using the work equation. Given that 30000 J of work was done over 9.5 m, the force is approximately 3157.89 N.

Explanation:

To find the applied force, we can use the equation for work, which is Work (W) = Force (F) × Distance (d). We were given the work done as 30000 J (joules) and the distance as 9.5 m (meters). Re-arranging the equation to solve for Force gives us F = W / d.

Plugging in our known values, we get:

F = 30000 J / 9.5 m

F = 3157.89 N (rounded to 2 decimal places)

Therefore, the applied force is approximately 3157.89 N (newtons).