An aquarium 4 ft long, 2 ft wide, and 2 ft deep is full of water. (Recall that the weight density of water is 62.5 lb/ft³.) (a) Find the hydrostatic pressure (in lb/ft2) on the bottom of the aquarium. lb/ft² (b) Find the hydrostatic force (in lb) on the bottom of the aquarium. Ib (c) Find the hydrostatic force (in lb) on one end of the aquarium. lb

It takes a force of 21,882 lb to compress a coil spring assembly from its free height of 6 inches to its fully compressed height of 3 inches. a. What is the assembly's force constant? b. How much work does it take to compress the assembly the first half inch? the second half inch? Answer to the nearest in-lb. a. k= lb/in

Please show all work:  50 meters of a circular observation tube with a flat glass window at the bottom is submerged in water as shown in the image. Assuming P(h)= 9800h N/m2, calculate the total force due to hydrostatic pressure on the exterior of the tube. The radius of the tube is 1 meter.