6-18 A body of mass m, tied to a rope,
moves in a circle at uniform speed 2.1
m/s. Its plane of motion is inclined 20°
above the horizontal. What is the
radius of motion if its speed is just
enough to always keep the
[Answer = 1.32 m)
ad to a string is
rope taut?

In order to place a satellite into orbit, it requires enough fuel to supply the necessary mechanical energy. into what types of mechanical energy does the fuel get transformed?

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.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?