A student travels a distance of 45 m from the ground to the top of a long staircase that rises at an angle of 36' with respect to the horizontal. How high is the student from the ground when they reach the top
of the staircase? Give your answer in metres, correct to the nearest metre.

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.