Physics, 25.10.2021 14:00 salgado100400
A 1.5 m long frictionless pendulum of mass 1.6 kg is released from point A at an angle 0 of 10 degrees. What is the speed of the pendulum at point D, half the height up to point E?
A) 0.18 m/s
B) 0.36 m/s
C) 0.47 m/s
D) 0.67 m/s
Answers: 2
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An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm
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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)
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Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road
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A 1.5 m long frictionless pendulum of mass 1.6 kg is released from point A at an angle 0 of 10 degre...
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