Answers: 1
Physics, 21.06.2019 23:00, hunterdylan01
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
Physics, 22.06.2019 02:00, LadyHolmes67
The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s
Answers: 3
Physics, 22.06.2019 02:00, browneyedbaby20
The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e
Answers: 3
Physics, 22.06.2019 04:50, badpotterchris
Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k
Answers: 2
Agalaxy is a grouping of many stars. what force keeps the stars in all galaxies together so that the...
Mathematics, 08.07.2021 19:40
Mathematics, 08.07.2021 19:40
Mathematics, 08.07.2021 19:40
Chemistry, 08.07.2021 19:40