A
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~davatar~
Due to my computer i can not see the pic so can u explain your question please
Answer:
106.24 kJ.
Explanation:
Given that,
Mass of sample of sand, m = 8 kg
Specific heat of sand, c = 664 J/kg-°C
The temperature changes from 20° C to 40° C. We need to find the change in thermal energy. It is given by :

So, the change in thermal energy is 106.24 kJ.