Question 1(Multiple Choice Worth 3 points) (01.01 LC)
Which of the following will increase the gravitational force exerted by one object on another?
O Increasing the temperature of the objects
O Decreasing the temperature of the objects
Decreasing the distance between the objects
O Increasing the distance between the objects

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

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.