Seriously Stuck..
A coal fired plant generates 600MW of electric power. The plant uses 4.8 x 10^6 kg of coal a day. The heat of combustion of coal is 3.3 x 10^7 J/kg. The steam that drives the turbines is at a temperature of 573K, and the exhaust water is 310K.
1.) What is the overall...
Does anyone know why I end up with the wrong answer?
I went delta q is equal to m c delta t, the derived the equation delta t is equal to delta q divded by mc. I therefore did the math as 232 kJ divided by (10 kg times 4.2 x 10 ^3 j/kg C) and got 9.7 x 10 ^4, when the answer was supposed to...
An immersion heater of resistance R converts electrical energy into thermal energy that is transferred to the liquid in which the heater is immersed. If the current in the hearter is I, the thermal energy trasferred to the liquid in time t is?
1) IRt
2) I^2Rt
3) IR^2t
4) IRt^2
5)...
Thermal Energy/ States of Matter- Help!
Hey guys! I have been on the road traveling for 6 weeks straight with not much time for schoolwork. Now I am home for 4 days so I have to get to work. I have finished one of my physics tests but wanted some reassurance that the answers are correct- as I...
How does the flow of thermal energy through a closed window illustrate the second law of thermodynamics? Which direction is the flow when it is cold outside? How outside?
--Please note this is a textbook question I can't seem to answer.