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2 years ago

What is the direction of friction if a ball is rolling on the ground?

1 answer:

3 0

The direction is the same as the direction the ball is moving in. Because of the rolling of the ball, the direction of movement of the surface of the ball is opposite the overall direction of the ball. Since friction will oppose the direction of movement of the surface of the ball, it is in the same direction as the net direction of movement of the ball.

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Branches of sicence

Sonja [21]

Answer:

physical science

earth science and life science

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2 years ago

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Jerry is conducting an experiment to test friction. His setup is shown below. If he wants to test the friction between different

professor190 [17]

Answer:

The correct option is D

Explanation:

This question is incomplete because of the absence of the setup which as been attached below. The setup shows/determines/tests the friction of wood (which is a block material), since Jerry wants to test the friction between different types of materials, he will have to replace the wooden block with another type of block material of choice so as to determine the friction of that also.

In order to have a comprehensive experiment, Jerry can use 4-5 different types of block material in the course of the experiment.

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2 years ago

How is biomass energy better than geothermal energy

aleksklad [387]

If you search that click the first link ;)

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2 years ago

3. An explosion of gas from a Hawaiian volcano blows a bunch of rocks into the sky. Each has 2000J of

anzhelika [568]

Answer: 3.906kg

Explanation:

K.E = 2000J

V = 32m/s

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K.E = 1/2MV2

2000 = 1/2M x (32^2)

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M = 3.906kg

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2 years ago

Which statement describes the relationship between energy and entropy in the universe?

rusak2 [61]

In fact, entropy of an isolated system never decreases (2nd law of thermodynamics), unless some external energy is provided in order to "restore" order in the system and decrease its entropy.

(note that when external energy is added to the system, it is no longer "isolated").

*This is only true if the question is referring to a certain system within the universe. If we are considering the universe itself as the system, then this option is no longer correct, because no external energy can be provided to the universe, and since the universe is an isolated system, its entropy can never decrease. If we are considering the universe itself as the system, none of the options is true.

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3 years ago

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