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ENERGY

ANY THING    THAT  HAPPENS - from  a   pin drop  to  an  explosion-requires  energy.Energy   is  the  capacity   for  "doing work"(making   something  happen)various  forms  of  e,energy  exists  ,including  light,  heat,sound,electrical,chemical,nuclear, kinetic,and  potential  energies.The  law   of    conservation  of  energy  states   that  the total  amount  of  energy  in  the Universe  is fixed  energy  
cannot   be   created   or  destroyed .It  means  that   energy  can  only  change  from  one  form  to  another.(energy transfer).For  example,potential   energy   is  energy that  is " stored "and  can  be  used  in  future.
An  object  gain  potential  energy,when  it  is  lifted  ;as  the  object  is  released,potential  energy  changes  into    the energy  of  motion(kinetic energy)during  transference,some  of  the  energy  converts   into   heat.A  combined  heat  and  power  station   can  put  some of  the  otherwise " waste"  heat     to  useful   effect   in  local   housing.Most  of  the  energy  of the  Earth's is  provided  by  the   Sun, In  the  form  of  electromagnetic  radiation.Some  of this  energy   transfers   to plant  and  animal  life,ultimately  to  fossil  fuels,where it  is  stored  in  chemical  form.Our  bodies  obtain  energy  from  the  food  we  eat.,while  energy  need  for  other tasks  such as   heating  and   transport,  can be  obtained  by  burning fossil  fuels-  or  by  harnessing natural  forces  like  wind or  moving  water-  to  generate   electricity.Another    source  is  nuclear power, where  energy  is  released by  reactions  in  the  nucleus of an    atom .All  energy    is  measured   by  the  international    unit,  the joule(J).As  a  guide  ,one  Joule  is  about  equal  to  the  amount  of  energy  needed   to  lift  an    apple  one  meter.
FORMS   OF  ENERGY 
  


  


  


  


  


  


  


  


  


  


  


  


  


  



  

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