Question

Определите мощность электрического чайника, если за 8 минут в нем 1,5 л воды нагреется от 20 градусов цельсия до 40 градусов цельсия? с= 4200 Дж/(Кг * градусы цельсия)дано тоже напишите,пожалуйста

Answer 1

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Answer 2

Calculation of the Power of the Electric Kettle

To determine the power of the electric kettle, we can use the formula:

Power (P) = Energy (Q) / Time (t)

Given: - Energy (Q) = specific heat capacity (c) * mass (m) * change in temperature (ΔT) - Specific heat capacity of water (c) = 4200 J/(kg * °C) - Mass of water (m) = 1.5 kg - Change in temperature (ΔT) = 40°C - 20°C = 20°C - Time (t) = 8 minutes = 8 * 60 seconds = 480 seconds

Let's calculate the power of the electric kettle using the given values:

Energy (Q) = c * m * ΔT = 4200 J/(kg * °C) * 1.5 kg * 20°C = 126,000 J

Power (P) = Energy (Q) / Time (t) = 126,000 J / 480 s ≈ 262.5 W

Therefore, the power of the electric kettle is approximately 262.5 Watts.