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EasyPhysicsthermometry
+4 / -1
A metallic vessel of negligible heat capacity contains 0.5 kg of water (of specific heat capacity 4200 J kg⁻¹ K⁻¹). It is heated from 15°C to 85°C by 750 W immersion heater in 4 minutes. The average loss of power in watts to the surroundings from the vessel during this time is nearly
A
70
B
123
C
138
D
212
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