A company that produces pulsed gas heaters claims their efficiency is approximately 90%. If an engine operates between 250°C and 25°C, what is its maximum thermodynamic efficiency?
a. 83%
b. 65%
c. 43%
d. 90%
e. 56%
c
You might also like to view...
What is the molarity of a solution that contains 2 mol of solute in 4 L of solution?
The narrowness of the rings of Uranus and Neptune is believed to be caused by
a. gravitational interactions between ring particles. b. a spiral density wave which confines them. c. the magnetic field which holds them in place. d. the smaller mass of Uranus and Neptune as compared to that of Saturn. e. small shepherd moons that orbit near the rings.
State the Law of Conservation of Linear Momentum
What will be an ideal response?
Opposing shearing forces of 3000 N are applied to the 4.00 cm × 5.00 cm faces of a 3.00 cm × 4.00 cm × 5.00 cm steel block. By what amount does the block become slanted? The shear modulus for steel is 8.10 × 1010 N/m2
A) 1.54 × 10-6 m B) 5.56 × 10-7 m C) 9.88 × 10-7 m D) 3.08 × 10-6 m E) 6.98 × 10-6 m