6 You are on a train travelling north at 80.0 m/s relative to the ground. The air is still relative to the ground when you hear the whistle of a train travelling south. You know that train whistles are emitted with a frequency of 262 Hz, but the whistle appears to have a frequency of 350 Hz. What is the speed of the other train

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

This is the substance(s) formed in a chemical reaction.

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.