a cyclist and his bicycle have a combined mad of 88 kg and a combined weight of 862.4 N. The cyclist accelerates at 1.2m/s2. After 2 seconds he reaches a speed of 2.4m/s2. what is his momentum at this point

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.