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Electrical Engineering
An electric geyser/electric storage tank water heater is used to raise the temperature of 150 litres of water from 20°C to 55°C in 2 hours and 3 minutes. The supply voltage is 230 V and the efficiency of the geyser is 90.5 %. Assume the specific heat capacity of water to be 4.19 kJ/kg.K and one litre of water to have a mass of 1 kg. Calculate the input energy required (in megajoules) to heat the water in the geyser to 55°C;

An electric geyser/electric storage tank water heater is used to raise the temperature of 150 litres of water from 20°C to 55°C in 2 hours and 3 minutes. The supply voltage is 230 V and the efficiency of the geyser is 90.5 %. Assume the specific heat capacity of water to be 4.19 kJ/kg.K and one litre of water to have a mass of 1 kg. Calculate the input energy required (in megajoules) to heat the water in the geyser to 55°C;

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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An electric geyser/electric storage tank water heater is used to raise the temperature of 150 litres of water from 20°C to 55°C in 2 hours and 3 minutes. The supply voltage is 230 V and the efficiency of the geyser is 90.5 %. Assume the specific heat capacity of water to be 4.19 kJ/kg.K and one litre of water to have a mass of 1 kg.
Calculate the input energy required (in megajoules) to heat the water in the geyser to 55°C; 

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