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My name is Ann [436]
3 years ago
8

What is the change in momentum of a 50. kg woman goes from running at 8.0 m/s to 0.0 m/s?

Physics
1 answer:
oksian1 [2.3K]3 years ago
4 0

Answer:

400 kg-m/s

Explanation:

Given that,

Mass of the woman, m = 50 kg

Initial velocity, u = 8 m/s

Final velocity, v = 0 m/s

We need to find the change in momentum of the woman. It can be given by :

\Delta p=m(v-u)\\\\=50\times (8-0)\\\\=400\ kg-m/s

So, the change in momentum is 400 kg-m/s.

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The answer to this question is B, Reacts with sunlight.

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Meanwhile, for chemical properties, they're about how the substance reacts with other substances, such as metals react with acid to form hydrogen. And by the word "react", it means there's no way turn the reaction product back to the original substance without using chemical methods such as heating or electrolysis. 

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A speaker at the front of a room and an identical speaker at the rear of the room are being driven at 456 Hz by the same sound s
vampirchik [111]

Answer:

2.97795 Hz

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Frequency of sound heard as the student moves away from one speaker

f_1=f'\dfrac{v-v_r}{v}\\\Rightarrow f_1=456\dfrac{343-1.12}{343}\\\Rightarrow f_1=454.51102\ Hz

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