Recent content by jongood

power in= 1350,000,000 kJ/h power out= 540,000,000 kJ/h so the difference is 810,000,000 kJ/h. I guess what I am confused about is the answer they are asking for .They are asking for the rate in which heat must be rejected? What is that exactly?

Thanks. Is there an equation I should be using? I used 1350*10^6 kJ/h * rate=150 MW rate=150 MW/1350*10^6 kJ/h and since 1350*10^6 kJ/h= 0.00375 MW rate=150 MW/0.00375 MW =40,000 Is this right? Seems too simple. Plus what would be the rate? 40,000 MW per hr?

Homework Statement An electric power plant produces 150 MW of power. If the coal releases 1350 × 106 kJ/h of energy, determine the rate at which heat must be rejected from the plant. Homework Equations The Attempt at a Solution So I am confused by what they are asking. So the...

Homework Statement If the calorific value of wood is 16 MJ/kg and a match weights approximately 0.17 g, then (a) how much energy (in joules) is released by burning the wooden part of a single match? If all of this energy were applied to do work to lift a 60 kg human vertically, against...

2.20264317 Btu will be needed. but since I only have .454 Btu, then the water will only increase by approx. .25 degrees C?

Oh yeah. sorry I knew that. It was in my notes but I read it too quickly. so I am kind of lost here. I know that 1 Btu is what will increase 0.454 kg of water 1 degrees. Since I have approx .5 Btu of energy but 1 kg of water... I don't know what formula to use...

Cp is for constant pressure. I copy and pasted it from a PDF lecture so it got jumbled up. So thermal is heat already right? As for the water, should i just assume it is 25 c since that is the standard. How would I convert Btu to C?

Homework Statement Horseshoe Falls, one of the Niagara Falls, has a 53 m drop. Consider one kg of water that falls over the falls. If, upon hitting the bottom of the falls, all of the water’s potential energy is converted to thermal energy and this heats the fallen water, calculate the...