Atank is full of water. find the work required to pump the water out of the spout. use the fact that water weighs 62.5 lb/ft3. (assume r = 6 ft, r = 12 ft, and h = 15 ft.)

Work done,

Solution:

Consider the weight of water is

Let us assume:

r = 6 ft

R = 12 ft

h = 15 ft

Now, let us consider the volume of the cross-section (horizontal) be dV, from the rim top let y be its vertical distance and dw be its weight

Now,

radius =

radius =

radius =

dV =

The weight of cross-section is given by:

Now, the work done is given by:

On solving the above equation , we get:

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: