This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A company that produces pulsed gas heaters claims their efficiency is approximately 90. If an engine ... (Read 53 times)

Charlie

  • Hero Member
  • *****
  • Posts: 640
on: Jul 28, 2018
A company that produces pulsed gas heaters claims their efficiency is approximately 90. If an engine operates between 250C and 25C, what is its maximum thermodynamic efficiency?
 a. 83
  b. 65
  c. 43
  d. 90
  e. 56

Question 2

A steam engine is operating at its theoretical maximum efficiency of 60. If the waste heat has a temperature of 100F (38C), what is the temperature of the boiler?
 a. 350C
  b. 94C
  c. 225C
  d. 504C
  e. 775C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

skipfourms123

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

D


Charlie

  • Member
  • Posts: 640
Reply 2 on: Jul 28, 2018
Gracias!

softEldritch

  • Member
  • Posts: 334
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Faulty outlooping produces lambda phage containing bacterial DNA Faulty outlooping produces lambda phage containing bacterial DNA
Cutaway of a V-8 engine showing the lifters, pushrods, roller rocker arms, and valves. Cutaway of a V-8 engine showing the lifters, pushrods, roller rocker arms, and valves.
(a) As an engine is accelerated under a load, the engine vacuum drops. This drop in vacuum is ... (a) As an engine is accelerated under a load, the engine vacuum drops. This drop in vacuum is ...
A port fuel-injected engine that is equipped with long, tuned intake-manifold runners. A port fuel-injected engine that is equipped with long, tuned intake-manifold runners.
Air flows through the PCV valve during acceleration and when the engine is under a heavy load. Air flows through the PCV valve during acceleration and when the engine is under a heavy load.
Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ... Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ...
Video: Phases of the ovarian cycle

For a complete list of videos, visit our video library