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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.

A mass of 50 kg falls 70m. If all its potential energy is converted to heat and gravitational acceleration = 9.8 m/s2, then the heat gained is

  3500 J

  490 J

  686 J

  34300 J

  Half-n-half Clue
 

2.

The heat supplied by a bunsen-burner flame on burning 4 m3 of gas which has a calorific value of 25000 J/m3 is

  6250.0 kJ

  100000kJ

  100.0 kJ

  6.2 kJ

  Half-n-half Clue
 

3.

Which loses the most heat in cooling to 10oC ?

  a kettle filled with water at 60oC

  a swimming pool filled with water at 30oC

  a glass filled with boiling water

  Half-n-half Clue
 

4.

_______ have the highest calorific value.

  Carbohydrates

  Fats

  Sugars

  Proteins

  Vitamins

  Half-n-half Clue
 

5.

Different gases have the same rate of expansion for the same rise in temperature.

  True

  False

 

6.

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 2 g of water in cooling from 75oC to 20oC ?

  8.4 J

  462.0 J

  231.0 J

  110.0 J

  Half-n-half Clue
 

7.

The heat produced on burning 9 kg of fuel oil which has a calorific value of 39800 kJ/kg is

  358200 MJ

  358.2 MJ

  4.4 MJ

  4422.2 MJ

  Half-n-half Clue
 


 
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