PHYSICS MIDDLE SCHOOL

Consider the car driving around a circular track. Once started, the driver maintains a speed of 45 m/h. Compare the driver's velocity with his acceleration in this case.A) The car is accelerating because it is changing direction but the velocity is
constant.
B) The car is traveling at a constant rate of speed so it is not accelerating and
the velocity does not change.
C) Acceleration is the change in velocity so the car is experiencing a change
in velocity and it is accelerating.
D) The car is traveling at a constant rate of speed so it is not accelerating but
the velocity changes because the direction the car travels is constantly
changing

Answers

Answer 1
Answer:

Answer:

B) The car is traveling at a constant rate of speed so it is not accelerating and the velocity does not change.

Explanation:

Since the driver is maintaining his speed, therefore velocity is constant and there is no acceleration because acceleration is the rate of change of speed with time.

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What phylum do animals with backbones belong to?

Answers

They belong to the kingdom of Chordata

What causes earthquakes and volcanic erruptions

Answers

Tectonic plates under the ground ,either go on top of each other or crash.
The tectonic plates as they have energy that causes volcanic explosions and earthquakes. SCIENCE!!!!!!!

A person is pulled to the right on a sled (total mass of 52.9 kg) across the surface of a frozen pond with a force of 67.7 Newtons so that they move with a constant velocity. What is the force of friction acting on the sled?

Answers

Answer:

67.7 N

Explanation:

Draw a free body diagram of the person on the sled.  There are four forces:

67.7 N  to the right,

friction force to the left,

weight force down,

and normal force up.

Constant velocity means 0 acceleration.

Sum of the forces in the x direction:

∑F = ma

67.7 N − F = 0

F = 67.7 N

There are 2 questions :)How did warm, moist air turn into a cloud?

Explain the specific conditions in the area that lead to that specific type of precipitation?

Answers

I can answer the first question: Water rises because of the sun's heat and turns into water vapor. After that, it gathers up and forms a cloud. When the cloud is filled enough with vapor, precipitation occurs.
For the first question, evaporation is when water evaporates and rises into the air, causing condensation, which turns warm and moist air into a cloud.
For the second question, if it were to precipitate in an area that is low in elevation, there would be no snow, sleet, or hail. There would only be raining, although not a lot. An example of these places is the desert (like Death Valley). If it were to precipitate in an area that is high in elevation, then it would be a different matter altogether. It would rain frequently, and it would also snow. There may also be sleet or hail. An example of these places would be the mountains (like Big Bear Mountain or something). Finally, if it is a level area and is near sea level, than it would neither precipitate frequently or almost never, it would just be like maybe it rained today, and we may not have any more rain for a month, or maybe it might unexpectedly rain for another 5 days in a row. You know what I mean? An example for these places is... let's say Irvine.
I hoped this helped you and have a great day!

What are the three types of acceleration?

Answers

I think what you're looking for is...

1).  speeding up
2).  slowing down
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Q: Through which of the following ways can heat be transferred?Optional Answer:

  A.  By direct or indirect contact between objects at different temperatures.
  B.  Only by direct contact between objects at different temperatures.
  C.  Only by indirect contact between objects at different temperatures.
  D.  Heat can never be transferred between objects.

Answers

A option will be the answer.
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