A skydriver of mass 80 kgs jumps out of a plane. (a) ignoring air resistance, draw a free body diagram with all forces acting on the sky driver.

(b) Now, suppose that the air resistance increases as the speed of the skydiver increases, draw
the forces acting on the skydiver 3 seconds later, assuming that the skydiver's acceleration is
1 m/sdownwards at this instance. (2 marks)

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Derive the formula 2as=v² -u² where the formula have have usual meanings

Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s