A heat engine with an efficiency of 30% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir?
A) 7100 J B) 8300 J C) 750 J D) 5800 J E) 1400 J
D
You might also like to view...
A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30? degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3 * 10 3 N/m. The block slides down the ramp and compresses the spring. Find the maximum compression of the spring.
The potential energy at x = 8 m is -2000 V and at x = 2 m is +400 V. What is the magnitude and direction of the electric field?
A) 200 V/m directed parallel to the +x-axis B) 300 V/m directed parallel to the +x-axis C) 400 V/m directed parallel to the +x-axis D) 500 V/m directed parallel to the +x-axis E) 600 V/m directed parallel to the +x-axis
A nuclear reactor is said to be critical when the average number of neutrons from each fission event that cause(s) another fission event is
a. <1. b. 1. c. >1. d. any of the above. e. only (b) or (c) above.
What is the first step in treating raw sewage?
A) filtration of solids B) removal of fine particles by settling C) removal of grit by settling D) removal of sludge E) disinfection