Calculate the work (in joules) required to pump all of the liquid out of a full tank. Assume a=6 m, b=12 m, liquid exits through the spout, c=3 m, and density of the liquid is 1000 kg/m3. (Use decimal notation. Give your answer to two decimal place.)

Explanation:

From the expression of workdone, we no that

Workdone= force * distance

also  

force=pressure *area

since pressure = density*height* gravity

we have

work done=pressure * area * distance

from the question, the workdone will be a dependent function on the height

hence we can write

to get the absolute workdone, we have to integrate both sides

Hence we have

3. dark matter

empty space could also be a simple vacuum

magnets not strong enough

explanation: