A particle of mass m is projected from point A with an initial velocity V0 perpendicular to line OA and moves under a central force F along a semicircular path of diameter OA. Observing that r0cos θ=r and using mr2dθ/dt=angular momentum, show that the speed of the particle is v=v0/cos2θ.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

The higher the astm grain size number, the finer the gran is. a)-true b)-false