« previous next »

Author Question: When a fuel cell operates, the energy transformation within the cell itself is A) thermal energy ... (Read 32 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
on: Jul 29, 2018
When a fuel cell operates, the energy transformation within the cell itself is
 
  A) thermal energy to electric energy.
  B) chemical energy to electric energy.
  C) electric energy to chemical energy.
  D) thermal energy to kinetic energy.
  E) chemical energy to thermal energy.

Question 2

The distance to the sun is about 150 million km. Expressed in powers of ten, this is
 
  A) 1.5  106 km.
  B) 1.5  108 km.
  C) 1.5  10-8 km.
  D) 1.5  10-6 km.
  E) None of the above.


akpaschal

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

A comparison between chromosomes found in a normal human cell and a cancer cell from the same person A comparison between chromosomes found in a normal human cell and a cancer cell from the same person
biology 30 cell biology 30 cell
A fuel pump in a farming area that clearly states the red diesel fuel is for off-road use only ... A fuel pump in a farming area that clearly states the red diesel fuel is for off-road use only ...
The Energy Sector The Energy Sector
An electrochemical cell is based on these two half-reactions An electrochemical cell is based on these two half-reactions
An antigen-presenting dendritic cell (blue) interacting with a T cell (yellow) An antigen-presenting dendritic cell (blue) interacting with a T cell (yellow)
Video: Blood Flow Through the Kidneys

For a complete list of videos, visit our video library