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Sagot :
Answer:
The average energy that the solar panel delivers to the water in one hour is 798,000 Joules
Explanation:
The given parameters are;
The temperature of the water that flows to the solar panels, T₁ = 15°
The mass of the hot water the panel supplies during the day, m = 3.5 kg
The temperature of the hot water supplied by the panel, T₂ = 65 °C
The heat capacity of the water, c = 4,200 J/(kg·°C)
The heat delivered to the solar panels in one hour, ΔQ, is given by the following formula
ΔQ = m·c·ΔT
m = 3.8 kg, c = 4,200 J/(kg·°C), and ΔT = T₂ - T₁ = 65 °C - 15 °C = 50 °C
∴ ΔQ = 3.8 kg × 4,200 J/(kg·°C) × 50°C = 798,000 joules
∴ΔQ = 798,000 joules
The average energy that the solar panel delivers to the water in one hour, ΔQ = 798,000 joules.
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