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

Author Question: When a Hooke's law spring is stretched a distance 3x, how much is the increase in energy stored in ... (Read 28 times)

maychende

  • Hero Member
  • *****
  • Posts: 556
on: Jul 28, 2018
When a Hooke's law spring is stretched a distance 3x, how much is the increase in energy stored in it from when it was stretched a distance x? Give your answer in terms of a multiple of the energy stored in the spring when it is stretched a distance x.
 a. It is 3 times as much.
  c. It is 4 times as much.
  b. It is 8 times as much.
  d. It is 9 times as much.

Question 2

A Carnot engine runs between a hot reservoir at Th and a cold reservoir at Tc. If one of the temperatures is either increased or decreased by 3.5 K, which of the following changes would increase the efficiency by the greatest amount?
 a. increasing Th
  b. increasing Tc
  c. decreasing Tc
  d. cannot be determined from information given


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mammy1697

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


maychende

  • Member
  • Posts: 556
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

JCABRERA33

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Energy of reactant molecules. Energy of reactant molecules.
Kinetic versus Potential Energy Kinetic versus Potential Energy
The Energy Sector The Energy Sector
Compression used to increase circulation when the athlete is clothed. Compression used to increase circulation when the athlete is clothed.
World Total Energy Consumption by Fuel Type World Total Energy Consumption by Fuel Type
Energy Use by Different Country Groups Energy Use by Different Country Groups
Video: How eudicots (true dicots) differ from monocots Animation

For a complete list of videos, visit our video library