1. A tank of water at an aquarium has an observation window on one of it's vertical walls. The window is in the shape of an isosceles triangle, pointing down-ward, with the bottom point being 0.5 m above the floor of the tank. The horizontal top edge of the window is 2 m wide, and each of its equal sides is 1.25 m long. The tank is filled to a height of 4 m above its floor. Find the force of the water on the window. Assume the water has a density of 1020 kg/m^3.

2.A tank is in the shape of the bottom half of a circular cylinder, where the rectanglalr top of the tank is 2 m wide and 6 m long. If the tank is initially full with a liquid of density 870 kg/m^3, how much work is required to pump the liquid to the level of the top of the tank and out of the tank?