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School Physics Quiz : Heat


Answer the following questions based on heat.

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Multiple choice

Your Performance  

1.

_______ have the highest calorific value.

  Carbohydrates

  Sugars

  Vitamins

  Proteins

  Fats

  Half-n-half Clue
 

2.

A mass of 50 kg falls 80m. If all its potential energy is converted to heat and gravitational acceleration = 9.8 m/s2, then the heat gained is

  4000 J

  39200 J

  784 J

  490 J

  Half-n-half Clue
 

3.

1 Joule = _______ ergs

  105

  107

  4.214

  4.184

  Half-n-half Clue
 

4.

Given that 1 cal (about 4.2 J) of heat is required to raise the temperature of 1 g of water by 1oC, how much heat is required to raise the temperature of 2 g of water by 7oC?

  58.8 J

  14.0 J

  29.4 J

  8.4 J

  Half-n-half Clue
 

5.

The increase in the area of a solid on heating is called

  superficial expansion

  cubical expansion

  linear expansion

  Half-n-half Clue
 

6.

Liquids exhibit only _______ expansion.

  cubical

  superficial

  linear

  Half-n-half Clue
 

7.

Water at 25oC is mixed with an equal mass of water at 90oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?

  57.5oC

  90oC

  25oC

  115.0oC

  Half-n-half Clue
 


 
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