« previous next »

Author Question: An inventor tries to sell you his new engine which takes in 40. Joules of heat at 87C on each cycle, ... (Read 65 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
on: Jul 29, 2018
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
Reply #1 on: Jul 29, 2018
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

big1devin

  • Hero Member
  • *****
  • Posts: 583
Reply #2 on: Jul 29, 2018
Thanks


Jody Vaughn

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 29, 2018
Welcome :)


« previous next »
 

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

A Toyota/Lexus hybrid electric vehicle has a ready light. If the ready light is on, the engine can ... A Toyota/Lexus hybrid electric vehicle has a ready light. If the ready light is on, the engine can ...
Glycolysis and the citric acid cycle Glycolysis and the citric acid cycle
Glutathione and the g-glutamyl cycle Glutathione and the g-glutamyl cycle
Subsurface mining takes place in underground tunnels Subsurface mining takes place in underground tunnels
Life cycle of a club fungus having two mating strains of hyphae Life cycle of a club fungus having two mating strains of hyphae
A generalized life cycle of a basidiomycete. A generalized life cycle of a basidiomycete.
Video: Enzyme-Catalyzed Reactions

For a complete list of videos, visit our video library