Physics, 01.02.2021 17:50, Esmail

1. How much thermal energy does a 2kg steel block (c=450J/kg°C) lose when it cools from 300°C to 20°C?

please help me and show the working out.

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1. How much thermal energy does a 2kg steel block (c=450J/kg°C) lose when it cools from 300°C to 20...