5.5-kW water heater operates at 240V. i.Should the heater circuit have a 20A or a 30A circuit breaker? ii. Assuming 85% efficiency , how long will it take to heat the water at a 0.2085-m3 tank from 20°C to 80°C?The density of water 1000kg/m3 and the specific heat capacity is 4,200J/kg/°C
5.5-kW water heater operates at 240V. i.Should the heater circuit have a 20A or a 30A circuit breaker? ii. Assuming 85% efficiency , how long will it take to heat the water at a 0.2085-m3 tank from 20°C to 80°C?The density of water 1000kg/m3 and the specific heat capacity is 4,200J/kg/°C
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter20: Electric Current, Resistance, And Ohm's Law
Section: Chapter Questions
Problem 60PE: Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a...
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5.5-kW water heater operates at 240V.
i.Should the heater circuit have a 20A or a 30A circuit breaker?
ii.
Assuming 85% efficiency , how long will it take to heat the water at a 0.2085-m3 tank from 20°C to 80°C?The density of water 1000kg/m3
and the specific heat capacity is 4,200J/kg/°C.
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