Slim jim pulls on a box for 6.5 m.
given: 35 n & 10kg
a. how much energy did him do?
b. what kind of energy does the box gain?
c. if there is no friction, how much energy does the box gain?

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

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 the measurement of how fast an object moves relative to a reference point?