- Mass of copper block, \(m_{Cu}\) = 50 kg
- Initial temperature of copper block, \(T_{Cu,initial}\) = 140°C
- Volume of water, \(V_{water}\) = 90 L = 0.09 m³ (since 1 L = 0.001 m³)
- Density of water, \(\rho_{water}\) = 1000 kg/m³ (approximately)
- Initial
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