Menu
  • call
  • chat
  • call
Header Add 1

Header Add 1

Rev. Notes > IGCSE > Energy, Work and Power
 
 
Previous Topic Energy, Work and Power Next Topic

Topics
 
Energy Kinetic energy Potential energy
Different types of energy Law of conservation of energy Energy resources
Work Power
 

Energy resources

Fossil-fuels
Most of the energy we use is obtained from fossil-fuel coal, oil and natural gas.

Wind
The wind is used to turn windmill like turbine which generate electricity directly from the rotating motion of their blades.

Motion of waves
This can be used to move large floats and generate electricity.

A very large number of floats is needed to produce a significant amount of electricity.

Dams
Dams on tide estuaries trap the water at high tide.

when the water is allowed to flow back at low tide, it can turn turbines to generate electrical energy.

Dams can be used to store water, which is allowed to fall in a controlled way that generate electricity.This is done in hydroelectric power.

Geothermal power
Geothermal power is obtained using the heat of earth.

In certain parts of the world, water forms hot springs which can be used directly for heating.

Nuclear fusion
During this process the small nuclei of hydrogen atoms join to make larger nuclei (helium nuclei) and an enormous amount of energy is released. This is the source of energy in sun.

 
Add Comment | FAQs | Report Error | | | Share on Twitter
 
View Comments on this Chapter - Total Comments (14)
 
john bertey Said :
thanks alot love this website
 
  17/04/15 08:08 PM
   
kemo Said :
please add diagrams to the topic very helpful
 
  01/02/15 03:39 PM
   
GGGG Said :
Awsm, notes but need a diagram
 
  18/08/14 07:48 AM
   
rebecca Said :
Very helpful website, thank you alot!!
 
  05/08/14 08:01 PM
   
Anonymous Said :
Thanks for these! Maybe a few more examples of worked questions/equations would be useful :-)
 
  07/05/14 09:41 AM
   
pratik Said :
u r awesome
 
  19/02/14 11:24 AM
   
hassaan khalid Said :
good notes
 
  14/01/14 06:50 PM
   
Lucy Said :
great notes! keep it up :)
 
  08/09/13 06:20 PM
   
Pak Hye Ri Said :
Really great notes thankyou ! :D Not that much questions though
 
  06/09/13 12:25 PM
   
anonymos Said :
best notes c:
 
  12/03/13 05:19 PM
   
Ghost Said :
These were really helpful notes... I got what I was looking for Thanks!!
------------------------------------------------------------------------------------- Admin Replied:

Thanks for your coment and keep visitng :)

 
  30/04/12 12:04 PM
   
Lujain Mohammed Said :
These notes are really helpful. Thanks a lot!
------------------------------------------------------------------------------------- Admin Replied:

Thank you for your comment

 
  03/04/12 05:09 PM
   
Adam Said :
There is some material about the pressure here http://physicsatweb.com/rev.php?id=Pressure
 
  23/12/11 07:52 PM
   
hermione felfel Said :
the notes are really good but i cant find anything about pressure
------------------------------------------------------------------------------------- Admin Replied:

Consider reading the chapter "Pressure"

 
  13/12/11 10:05 AM
 

 

footer 1

   
Footer Add 1

    Footer Add 2

Signup for our Newsletter

About us:

A team of committed professionals providing online resources of physics for the learners of IGCSE/AS/ A Level .....

footer-image