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7nadin3 [17]
3 years ago
9

A wave has a wavelength of 10 mm and a frequency of 14 hertz. What is its speed?

Physics
1 answer:
Katena32 [7]3 years ago
3 0
0.14 meters per second .
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Answer:

J = 0.7 N-s away from wall

Explanation:

Given that,

Mass of the ball, m = 0.2 kg

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Final speed of the ball, v = -1.5 m/s (as it rebounds)

Impulse is equal to the change in momentum. So,

J=m(v-u)\\\\J=0.2\times (-1.5-2)\\\\J=-0.7\ N-m

So, the impulse given to the ball is 0.7 N-m and it is away from the wall. Hence, the correct option is (c).

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A torque of 50 N*m acts on a wheel of moment of inertia 25 kg*m^2 for 4 s and then is removed.
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