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				| 1. | A 4 kW, 20 litre water heater is switched on for 10 minutes. The heat capacity Cp for water is 4 kJ/kg-K. Assuming all the electrical energy has gone into heating the water. The increase of the water temperature is | 
| A. | 15°C | 
| B. | 20°C | 
| C. | 26°C | 
| D. | 30°C | 
| Answer» E. | |