1. Immersion heaters are placed into liquids to warm them up. If 250 g of water in a cup is heated from 15°C to 97 °C in 5.0 m, what current must the heater draw from a 12.0-V battery? (C = 4.184 J/g °C)

1. Immersion heaters are placed into liquids to warm them up. If 250 g of water in a cup is heated from 15°C to 97 °C in 5.0 m, what current must the heater draw from a 12.0-V battery? (C = 4.184 J/g °C)

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 57PQ

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

Gr 11 level No calculus

1. Immersion heaters are placed into liquids to warm them up. If 250 g of water in a cup is
heated from 15°C to 97 °C in 5.0 m, what current must the heater draw from a 12.0-V
battery?
(c = 4.184 J/g °C)

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