jabalarustam27

solve equations by dimensional analysis method 

how do certain topics and themes stay revlavent across time periods, while others do not

An aquarium 8 m long, 2 m wide and 3 m deep is full of water. Findthe work needed to pump half of the water out of theaquarium?
(The acceleration due to gravity is 9.8 and the density of water is1000 .)
note: show me how u did it, please?

Use the map G(u, v) = u v + 1 , uv v + 1 to compute D (x + y) dx dy, where D is the region bounded by x + y = 4, x + y = 8, y = x, y = 8x.