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Questions on Energy Transitions

Q10.

(a) Each of the four objects shown above started at room temperature. Now they are all at different temperatures, as described by the labels.

(i) Which object is at the highest temperature?

1 mark

(ii) Which object has lost thermal energy?

1 mark

(iii) Which object has had the largest gain in thermal energy?

1 mark

(b) Omar puts a hot steel ball into a beaker of cold water. He waits until the temperatures of the ball and the water are the same. From his results, he calculates that:

the thermal energy stored in the steel ball has fallen by 3770 J
the thermal energy stored in the water has risen by 2940 J
The energy stored in the water rose by less than 3770 J

What has happened to the other 830 J?

1 mark

Maximum 4 marks