Author Question: An inventor tries to sell you his new engine which takes in 40. Joules of heat at 87C on each cycle, ... (Read 48 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
An inventor tries to sell you his new engine which takes in 40. Joules of heat at 87C on each cycle, expels 30. Joules at 27C, and does 10. Joules of work. Why are you not fooled, and can have him prosecuted as a fraud?
 
  What will be an ideal response?

Question 2

When a mass of 0.350 kg is attached to a vertical spring and lowered slowly, the spring stretches a distance d. The mass is now displaced from its equilibrium position and undergoes 100 oscillations in 48.9 s. What is the stretch distance d?
 
  A) 2.35 cm
  B) 2.97 cm
  C) 4.71 cm
  D) 5.94 cm
  E) 6.28 cm



Jody Vaughn

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

The greatest efficiency possible between those temperatures would be 17 (1-300/360 ) and he has claimed a higher efficiency than is physically possible.

Answer to Question 2

D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

For a complete list of videos, visit our video library