Urgent answer two forces each 4n act on the opposite side of a 0.4m square plate. calculate the resultant force and couple acting on the plate

What are the applications of electromagnetic waves

What is the angular momentum of the bar about the axle?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)