A sling is being rotated at the rate of 100 rpm
a) What will the length of the sling have to be so that the speed of the object
at the end will be 40 meters per second? (in meters)
b)
If the sling is 1 meter long, how fast will the object at the end be
traveling? (in meters per second)
How many revolutions will the sling make over one hour?

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

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.