In a steam power station the coal consumption is 0'4 kg per kwh output. if the calorific value of coal is 6800 kcall kg , boiler efficiency 70% and mechanical and electrical efficiency of alternator is 90%, prepare roughly the heat balance sheet for the power station.
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Physics, 21.06.2019 18:00, Pumpkinputters
Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?
Answers: 1
Physics, 22.06.2019 09:30, sdolina5
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
In a steam power station the coal consumption is 0'4 kg per kwh output. if the calorific value of co...
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