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den301095 [7]
3 years ago
9

Which image shows the difference between the speed of molecules in hot and cold water? Explain your answer choice.

Physics
2 answers:
Leto [7]3 years ago
7 0
There is no image btw
Fofino [41]3 years ago
6 0

Answer:

the answer is B

Explanation:

I think its B because on the top it shows the molecule speed and A looks like the water is cold, C shows that the hot

water is cooler, and D shows that both are cold

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Answer: a) 7.1 * 10^3 N; b) -880 N directed out of the curve.

Explanation: In order to solve this problem we have to use the Newton laws, then we have the following:

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Then to calculate the frictional force (f) we can use the second equation

f=P sin (15°) -m*ac where ac is the centripetal acceletarion which is equal to v^2/r

f= 750 *9.8 sin(15°)-750*(85*1000/3600)^2/150= -880 N

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