Quick questions on Thermal expansion and specific heat capacity explained: O-Level Physics

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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Calculate the energy needed to raise the temperature of

0.20\ \text{kg}

of water by

30\,^\circ\text{C}

(

c = 4200\ \text{J kg}^{-1}\,^\circ\text{C}^{-1}

). [2 marks]

What is q2?

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Explain, using particles, why a metal ball expands when heated. [2 marks]

What is q3?

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Explain why water is a good coolant for engines. [2 marks]

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