Consider two identical particles of massm, initially at rest and separated by distanced0(a) Find an analytic expression for the time needed for the two particles to reach a the influence of mutual gravitational attraction. (This is the continuation ofthe example begun in lecture.)(b) Evaluate this time for the problem that you considered in p-set 0 and compare the results

Air at a pressure of 1atm and a temperature of 40 c is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 120 c. the plate has a length of 0.40m (in the flow direction) and a width of 0.15m. the reynolds number based on the plate length is 50, 000. what is the rate of heat transfer from the plate to the air? if the free stream velocity of the air is doubled and the pressure is increased to 10 atm what is the rate of heat transfer?