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lorasvet [3.4K]
3 years ago
6

- A student states that Earth would be no different if water did not expand when it freezes. Do you agree with this statement? E

xplain your answer.
Physics
2 answers:
chubhunter [2.5K]3 years ago
7 0
If water didnt expand when it froze then it would be more dense so ice would sink. If ice sunk then it would cause a lot of ocean life to die because of the cold and water levels to rise more.
Licemer1 [7]3 years ago
4 0

Yes I agree.

The very basic fundamental to remember here is that the ice when expands causes the floating of itself on top of water. Thus, if ice stops expanding, it will not float on the top of water body and thus would sink and may cause the freezing additional water in the water bodies. This could happen in the Antarctic , Arctic and all cold regions. Rivers may stop flowing in cold regions as they all will be frozen and also the survival of species will become difficult

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The kinetic energy of the child at the bottom of the incline is 106.62 J.

The given parameters:

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The vertical height of fall of the child from the top of the incline is calculated as;

sin(20) = \frac{h}{2} \\\\h = 2 \times sin(20)\\\\h = 0.68 \ m

The gravitational potential energy of the child at the top of the incline is calculated as;

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Learn more about conservation of mechanical energy here: brainly.com/question/332163

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