Flying Circus of PhysicsExploding shoes. The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. Thesudden conversion of water to water vapor causes a dramatic expansion that can rip apart shoes. Water has density 1000 kg/m3 andrequires 2256 kJ/kg to be vaporized. If horizontal current lasts 2.26 ms and encounters water with resistivity 154 Q-m, length 14.0cm, and vertical cross-sectional area 15.2 x 10-5 m², what average current is required to vaporize the water?NumberiUnits

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2, what average current is required to vaporize the water?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Current And Resistance

Section: Chapter Questions

Problem 27.65AP

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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

Flying Circus of Physics
Exploding shoes. The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. The
sudden conversion of water to water vapor causes a dramatic expansion that can rip apart shoes. Water has density 1000 kg/m3 and
requires 2256 kJ/kg to be vaporized. If horizontal current lasts 2.26 ms and encounters water with resistivity 154 Q-m, length 14.0
cm, and vertical cross-sectional area 15.2 x 10-5 m², what average current is required to vaporize the water?
Number
i
Units

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