Solve the problem.A heat engine is a device that converts thermal energy into other forms. The thermal efficiency, e, of a heat engine is defined by 
where Qh is the heat absorbed in one cycle and Qc, the heat released into a reservoir in one cycle, is a constant. Find 
.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: D
Mathematics
You might also like to view...
Find the derivative of y with respect to the independent variable.y = 7x
A. x ln 7 B. 7x C. 7x ln 7 D. 7x ln x
Mathematics
Solve the inequality. Write the solution set in interval notation and graph it.-10r + 6 ? -2(4r - 11)
A. (-8, ?)
B. (-?, -8)
C. [-8, ?)
D. (-?, -8]
Mathematics
Write the expression with positive exponents, and simplify if possible.(-2)-4
A. 16
B. - 
C. -16
D. 
Mathematics
Find the real solutions of the equation.
= 9
A. {79} B. {81} C. {121} D. {83}
Mathematics