This topic contains a solution. Click here to go to the answer

Author Question: An inventor tries to sell you his new thermodynamic engine that takes in 40 J of energy at 87C on ... (Read 91 times)

nevelica

  • Hero Member
  • *****
  • Posts: 563
An inventor tries to sell you his new thermodynamic engine that takes in 40 J of energy at 87C on each cycle, expels 30 J at 27C, and does 10 J of work.
 
  Would it be wise to invest in this engine? Back up your conclusion with numerical calculations.

Question 2

A 500-nm-wavelength beam of light illuminates a soap film with air on both sides and an index of refraction 1.33.
 
  If the beam of light is incident normally on the film, what is the minimum thickness of the film to make the reflected light enhanced in brightness? A) 47.0 nm
  B) 74.0 nm
  C) 94.0 nm
  D) 152 nm
  E) 268 nm



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aham8f

  • Sr. Member
  • ****
  • Posts: 336
Answer to Question 1

Save your money He has claimed an efficiency of 25, but the greatest possible efficiency for an engine operating between these temperatures is only 17, for a Carnot engine.

Answer to Question 2

C





 

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?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

For a complete list of videos, visit our video library