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School Physics Quiz : Heat


Answer the following questions based on heat.

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Multiple choice

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1.

The heat produced on burning 7 kg of fuel oil which has a calorific value of 39800 kJ/kg is

  5685.7 MJ

  278.6 MJ

  278600 MJ

  5.7 MJ

  Half-n-half Clue
 

2.

Water at 25oC is mixed with an equal mass of water at 70oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?

  47.5oC

  25oC

  70oC

  95.0oC

  Half-n-half Clue
 

3.

1 Joule = _______ ergs

  107

  105

  4.184

  4.214

  Half-n-half Clue
 

4.

Heat energy travels through _______ by conduction only.

  gases

  solids

  liquids

  Half-n-half Clue
 

5.

Liquids exhibit only _______ expansion.

  linear

  superficial

  cubical

  Half-n-half Clue
 

6.

_______ requires no medium.

  Convection

  Conduction

  Radiation

  Half-n-half Clue
 

7.

Given that 1 cal (about 4.2 J) of heat is lost by 1 g of water in cooling by 1oC, how much heat is lost by 5 g of water in cooling from 70oC to 10oC ?

  1260.0 J

  252.0 J

  21.0 J

  300.0 J

  Half-n-half Clue
 


 
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