Monarch butterflies can sustain air speeds of 4.8 m/s while migrating. a certain monarch wants to fly to a location due east 4.7 km away. a steady 2.4 m/s breeze is blowing from the west to the east. how long will it take the monarch to make the trip to the location to the east?

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?

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.

What is friction? how does it affect the motion of an object?