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DOES ANYONE KNOW WAHTS NOISE POLLUSION POEM?

1 answer:

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Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree.

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Two bicycle tires are set rolling with the same initial speed of 4.00 m/s along a long, straight road, and the distance each tra

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The coefficient of rolling friction for the tire under low pressure is 0.0342.

Explanation:

Two bicycle tires are set rolling with the same initial speed of 4.00 m/s

Final speed of both the bicycle, speed is reduced by half is measured, v = 2 m/s.

Here,

$u_kmg = ma\\\\a=\mu g$

Using third equation of motion as :

$v^2-u^2=2as\\\\v^2-u^2=2\mu gs\\\\\mu =\dfrac{v^2-u^2}{2gs}\\\\\mu =\dfrac{4^2-2^2}{2\times 9.8\times 17.9}\\\\\mu=0.0342$

So, the coefficient of rolling friction for the tire under low pressure is 0.0342.

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3 years ago

In a particular television picture tube, the measured beam current is 23.3 µA . How many electrons strike the tube screen every

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Answer:

Explanation:

Given that

Beam current (i)=23.3µA

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Also, a fundamental charge e=1.602×10^-19C

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q=it

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Also, the number of electron N is given as

q=Ne

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N=4.072×10^15

There are 4.072×10^15 electrons strike the tube screen every 28 s.

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