When the stones were cooled to 50 degrees Celsius, 200 Joules of energy were released. What is the mass of the lamina?
| August 6, 2021 | education
To calculate the mass of cooled brass, we apply the formula: Q = Cl * m * Δt and m = Q / (Cl * Δt).
Values of variables and constants: Q – released heat (Q = 200 J); Cl is the specific heat capacity of brass (Cl = 400 J / (kg * K)); Δt – temperature change (Δt = 50 ºС).
Let’s calculate: m = Q / (Cl * Δt) = 200 / (400 * 50) = 10 * 10-3 kg (10 g).
Answer: 10 grams of brass has cooled down.
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