C. A 5.5-kW water heater operates at 240 V. i. Should the heater circuit have a 20A or a 30A circuit breaker? ii. Assuming 85% efficiency, how long will the heater take to heat the water in a 0.2085-m3 tank from 20°C to 80°C? The density of water is 1,000 kg/m3and the specific heat capacity is 4,200 J/kg/°C.

C. A 5.5-kW water heater operates at 240 V. i. Should the heater circuit have a 20A or a 30A circuit breaker? ii. Assuming 85% efficiency, how long will the heater take to heat the water in a 0.2085-m3 tank from 20°C to 80°C? The density of water is 1,000 kg/m3and the specific heat capacity is 4,200 J/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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