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Leviafan [203]
3 years ago
7

If a ball is thrown straight up into the air, what is its acceleration as it moves upward? What is its acceleration when it reac

hes its highest point and is stopped at an instant?
Physics
2 answers:
tatuchka [14]3 years ago
7 0
The ball is constantly being accelerated downward by gravity at a rate of 9.80665 m/ss 
Norma-Jean [14]3 years ago
4 0
<span>The only acceleration acting on the ball once it leaves the thrower's hand is gravity. Therefore at the highest point where the ball is momentarily stopped the acceleration is still g.</span>
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The potential energy is defined as Ep=m*g*h where m is the mass of the body, g=9.81 m/s² and h is the height of the body. In our case m=0.01 kg and h=1.5 m. So when we input the values into the equation:

Ep=0.01*9.81*1.5= 0.14715 J. 

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Complete the sentences to describe the convection experiment.
riadik2000 [5.3K]

Answer:

The<u> heat transfer </u>model showed convection.

In the convection model, the red water on the bottom of the beaker <u>is hot</u>

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When the water on the bottom of the beaker is heated, it expands and becomes less dense.

The water near the top of the beaker is cold which makes it denser than the water at the bottom of the beaker.

Thus, the hot water from the bottom of the beaker will ascend  toward the top of the beaker, while the cold water on top will descend toward the bottom. As long, as there is a difference of temperature between the water on the bottom and on top of the beaker, there will be a continuous movement of the particles: cold particles from the top replace hot particles from the bottom that ascend, and when the cold particles are heated they will ascend and will be replaced by new cold particles. This continuous translation of hot and cold particles in fluids is the model of heat transfer by convection.

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Lapatulllka [165]
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aev [14]

Answer:

Written Below.

Explanation:

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Sidenote: I hope this helps! :)

7 0
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