Which of these os true? (A)light travels in a straight line.(B)light travels in a random manner. (C) parallel beams are divergent in nature.(D)parallel beams are convergent in nature.(E)non of the above

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.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?