A man runs 400 meters north with a speed of 3 meters/second. How long does it take him to complete his trip? Answer in seconds. Round your answer to 3 decimal places. *

What will a positive and a negative charge do if they are separated from each other?

Work = force × a. work b. energy c. distance d. momentum

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.