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What does it mean to do science

1 answer:

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Answer:

Doing science could be defined as carrying out scientific processes, like the scientific method, to add to science's body of knowledge.

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Answer

given,

Power output of loud train = 100 W

Distance of intensity level from train= 100 m

I₀ = 10⁻¹² W/m²

Intensity of sound = ?

we know,

$I = \dfrac{P}{Area}$

$I = \dfrac{P}{4\pi r^2}$

$I = \dfrac{100}{4\pi 100^2}$

$I =7.957\times 10^{-4}\ W/m^2$

Intensity level

= $10 log(\dfrac{I}{I_0})$

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5. Kelvin applied a rightward force of 302 N to a 29 kg desk to accelerate it across the floor. The

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The force of friction is 213.2 N

Explanation:

The frictional force acting on an object sliding on a surface is given by:

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In this problem we have

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