subject
Physics, 20.11.2019 02:31 SmokeyRN

At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate heat input of the second. the operating temperatures of the first are 740∘c and 440 ∘c, and of the second 415 ∘c and 270 ∘c.
part a
if the heat of combustion of coal is 2.8×107j/kg, at what rate must coal be burned if the plant is to put out 950 mw of power? assume the efficiency of the engines is 65% of the ideal (carnot) efficiency.
express your answer using two significant figures.
part b
water is used to cool the power plant. if the water temperature is allowed to increase by no more than 4.5∘c, estimate how much water must pass through the plant per hour.
express your answer using two significant figures.

ansver
Answers: 1

Another question on Physics

question
Physics, 21.06.2019 16:10
Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.
Answers: 3
question
Physics, 21.06.2019 23:50
Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?
Answers: 3
question
Physics, 22.06.2019 08:50
The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?
Answers: 2
question
Physics, 22.06.2019 16:30
In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic
Answers: 1
You know the right answer?
At a steam power plant, steam engines work in pairs, the heat output of the first one being the appr...
Questions
question
Mathematics, 07.09.2021 01:20
question
Mathematics, 07.09.2021 01:20
question
Mathematics, 07.09.2021 01:20
Questions on the website: 13722366