One of the great difficulties in landing on Venus is dealing with the crushing pressure of the atmosphere, which is 92 times the Earth’s atmospheric pressure.
(A) If you are designing a lander for Venus in the shape of a hemisphere 2.5 m in diameter, how many Newtons of inward force must it be prepared to withstand due to the Venusian atmosphere?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.