karamiqbal123 karamiqbal123

19-09-2021
Physics

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a domestic hot water tank contains 200 kg of warer at 20°C. how much energy must be supplied to heat this water to 70°C (specific heat capacity of water =4200J/kg°C

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JoshEast JoshEast

19-09-2021

Answer: 4.2 × 10⁷

Explanation:

E = mcΔT

E = (200 kg)(4200 J/kg°C)(20 - 70°C)

E = 42000000 J

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