You are on the roof of a building, 46.0 m above the ground. Your friend, who is 1.80 m tall, is standing next to the building. What speed would egg dropped from rest be traveling when it hit your friend on the top of his hand? A.) 866 m/s
B.) 20.8 m/s
C.) 10.4 m/s
D.) 29.4 m/s

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

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)

Matter that emits no light at any wavelength is called