« previous next »

Author Question: If a new machine is more efficient than the old model, it uses a smaller amount of energy to do the ... (Read 33 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jul 28, 2018
If a new machine is more efficient than the old model, it uses a smaller amount of energy to do the same task.
 
  Why hasn't the experience with all the electric machines over the 130 year history of commercial electricity sales produced a machine that is 100 efficient?

Question 2

Solar ponds store solar energy.
 
  What will be an ideal response?


kristenb95

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 28, 2018
Answer to Question 1

It is impossible to eliminate all causes of friction in machines. It will never be
possible to have a machine that is 100 efficient.

Answer to Question 2

The energy in solar ponds is stored in the gradient between the salt and fresh
water layers.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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?

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

American women operating machine lathes in a munitions factory. American women operating machine lathes in a munitions factory.
Energy in China Energy in China
Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ... Twelve primary energy channels and the Conception and Governing Vessels of Traditional Chinese ...
Energy Balance Is Achieved When Energy (Calories) In Equals Energy (Calories) Out Energy Balance Is Achieved When Energy (Calories) In Equals Energy (Calories) Out
Model of GABA - receptor chloride channel Model of GABA - receptor chloride channel
Denney's model ON actual level of performance on exercised and unexercised abilities Denney's model ON actual level of performance on exercised and unexercised abilities
Video: Secondary Active Transport

For a complete list of videos, visit our video library