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arrow_drop_downspeaker_notes Quiz

speaker_notes Physics (WAEC 2010)

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This is for O'level students preparing for Physics WAEC examination.
Instruction: Achieve at least 50% in less than 30 seconds per question.

Quiz Started: 0 Second ago · 29 March 2024 6:9 · Questions: 50 · Answered: 0 · Recommended Time: 0h:25m:0s
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43 Click Here To Discuss Question

An electric drill rated 400W is used to drill a hole in copper of mass 400g in 20s. Calculate the rise in temperature if all the heat produced is absorbed by the copper. [specific heat capacity of copper = 400Jkg-1K-1]

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44 Click Here To Discuss Question

 

A solid of mass 0.5kg initially at 50oC melts at 60oC. Calculate the quantity of heat required to melt it completely. [specific heat capacity of the solid =2.0KJ kg-1K-1][Specific latent heat of fusion of solid =1.0 KJ kg-1]

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