Answers

2016-04-19T18:53:55+05:30
Molecules with a lot of thermal energy (or 'heat') have a high kinetic energy and so have a high velocity (move faster) whereas molecules with a small amount of thermal energy have a small kinetic energy and therefore a small velocity. This means molecules in a 'hot' region collide with molecules in a 'cold' region more frequently than molecules in a 'cold' region collide with molecules in a 'hot' region, so this is the net direction of energy transfer
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2016-04-19T19:12:45+05:30
 THE MOLECULES WHICH HAVE ALOT OF HEAT HAVE HIGHER KINETIC ENERGY SO HAVE A HIGHER VELOCITY.  AND THESE MOVE FASTER.AND THE MOLECULES WHICH HAVE LOW HEAT ENERGY HAVE A VERY SMALL KINETIC ENERGY SO THESE HAVE LOW VELOCITY AND MOVE SLOWER.BY THIS WE CAN SAY THAT THE MOLECULES IN HOT REGION COLLIDE WITH THE MOLECULES IN THE COLD REGION AND THE COLD REGION MOLECULES COLLIDE WITH THE HOT REGION MOLECULES AND SO ON... SO HEAT FLOS FROM THE HOTTER BODY TO COLDER BODY.


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