« 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 28 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?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Bonding Partners and Energy May Change in a Chemical Reaction Bonding Partners and Energy May Change in a Chemical Reaction
Human Heart Model Human Heart Model
Energy Chart Energy Chart
A model of T7 gp4 helicase action A model of T7 gp4 helicase action
Model for chromatin replication Model for chromatin replication
Producer acquiring energy and nutrients from the environment Producer acquiring energy and nutrients from the environment
Video: Replication of DNA and Chromosomes/ How do cells replicate their DNA? (Animation) no Audio

For a complete list of videos, visit our video library