Answer:
Explanation:
Given
wavelength of emissions are


Energy is given by

where h=Planck's constant
x=velocity of Light
=wavelength of emission




frequency corresponding to this emission



Energy corresponding to 



frequency corresponding to this emission



You have to find the calculate<span> the circumference first then you can just multiply the diameter by π, which is about 3.142. That gives you the distance for each </span>revolution<span>. Then you can multiply by the </span>number of revolutions<span> per minute.
</span>
Answer:
Explanation:
Assume that a single baby cries at X db
4 babies crying would be X + 10log₁₀(4) = X + 6 db
Answer:

Explanation:
Thrust is known as a reaction force which appears when a system expels or accelerates mass in one specific direction. If we know the acceleration and the mass of the air expelled by the jet engine, we can compute the thrust
.
The acceleration is calculated by using the dynamics formula

The values are


The thrust is
