1. a wooden dowel rod has a mass of 0.88 kg and a length of 1.2 m with an axis of rotation through the end.
2. a piece of cardboard has a length of 32 cm, a width of 22 cm and a mass of 92 g with an axis of rotation through the center.
3. a wooden hoop has a mass of 2.5 kg and a radius of 15 cm with an axis of rotation through the center.

=force × distance a. work b. velocity c. pressure d. momentum

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)