Physics, 14.11.2019 19:31 miguelc2145
Asystem consists of two particles. at t = 0 one particle is at the origin; the other, which has a mass of 0.50 kg, is on the y-axis at y = 6.0 m. at t = 0 the center of mass of the system is on the y-axis at y = 2.4 m. the velocity of the center of mass is given by (0.75 m/s3) t2i^. a)find the total mass of the system b)find the acceleration of the center of mass at any time t. c)find the net external force acting on the system at t = 3.0 s
Answers: 2
Physics, 22.06.2019 14:30
Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules
Answers: 2
Physics, 22.06.2019 14:30
Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2
Answers: 1
Physics, 22.06.2019 17:20
The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.
Answers: 3
Physics, 22.06.2019 18:00
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)
Answers: 3
Asystem consists of two particles. at t = 0 one particle is at the origin; the other, which has a m...
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