A group of dog pulls a sled across a snow covered surface. It takes 5 hours to pull the 200 kg sled 100 kilometers. If the static friction is 0.4 and the dynamic friction is 0.1 what is the average power exerted by the dog sled team?
(A) 1,067 W
(B) 5,333 W
(C) 3,84 kW
(D) 266.8 W
You must choose between four pieces of comparable equipment based on the costs and salvage values given below. All four pieces have a life of 8 years.
The discount rate is 12%. Ignore taxes. The two most preferable projects and the approximate difference between their present worth values based on least cost are:
(A) A and C, $170 (B) B and D, $170 (C) A and C, $234 (D) B and D, $234
Correct Answer: B
Which of the following are not an intensive property? Pressure Velocity Volume Density Kinetic Energy
（A）I, II & III （B） IV & V （C） I, II & IV （D） III & V
Correct Answer: D
If a process is considered to be internally reversible and adiabatic, what can the change in entropy be assumed to be?
(A) Entropy becomes Infinite (B) Entropy increases (C) Entropy decreases (D) Entropy does not change
Correct Answer: D
More PE Exam Questions
- 1
If a process is considered to be internally reversible and adiabatic, what can the change in entropy be assumed to be?
- 2A group of dog pulls a sled across a snow covered surface. It takes 5 hours to pull the 200 kg sled 100 kilometers. If the static friction is 0.4 and the dynamic friction is 0.1 what is the average power exerted by the dog sled team?
- 3What cycle is the most efficient?
- 4What is the gauge pressure of at a point that is 15 meters below the surface of water that has an atmospheric pressure of 14.7 PSIA?
- 5What is the natural frequency of a body that has a period of oscillation of 2.7 seconds?