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mr_godi [17]
3 years ago
13

People with good hearing can perceive sounds as low in level as −7.53 dB at a frequency of 3000 Hz. What is the intensity of thi

s sound in watts per meter squared?

Physics
1 answer:
lora16 [44]3 years ago
3 0

Answer:

attached below

Explanation:

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A 50.0 kg object rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and
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Answer:

f=140\ N

Explanation:

Given:

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<u>Now the value of limiting frictional force offered by the contact surface tending to have a relative motion under the effect of force:</u>

F_s=\mu_s.N

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F_s=0.3\times (50\times 9.8)

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As we know that the frictional force acting on the body is always in the opposite direction:

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so, the frictional force will be:

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