6th Science : Term 2 Unit 1 : Heat : Numerical problems

**Numerical
problems**

**1.
I put a kettle containing 1 litre of cold water on the gas stove, and it takes
5 minutes to reach the boiling point. My friend puts on a small electric
kettle, containing ½ litre of cold water, and it takes 5 minutes to get up to
boiling point. Which gives more heat in 5 minutes?**

**a.
the gas supply; or**

**b.
the electricity supply?**

**Can
you say how many times as much?**

** **

**2.
One calorie heat energy is needed to raise the temperature of the water from 30ºC
to 31ºC.How much heat energy is needed to raise the temperature of the water
from 30ºC to 35ºC.**

Tags : Heat | Term 2 Unit 1 | 6th Science , 6th Science : Term 2 Unit 1 : Heat

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6th Science : Term 2 Unit 1 : Heat : Numerical problems | Heat | Term 2 Unit 1 | 6th Science

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