Answer:
The upward buoyancy force on an object acts through the overall center of buoyancy, being the centroid of the displaced volume of fluid. The weight force on the object acts through its center of gravity.
Answer: A medium is any substance or region through which a wave is transmitted. The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f).
Answer:


Explanation:
As we know that for a satellite the force of gravitation is equal to the centripetal force
so we will have


so we know that kinetic energy is given as

so we have

now for time period we know

from above expression of kinetic energy we have

so we have

so square of time period is given as
