COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 18, Problem 82QAP
To determine
(a)
The average current in lightning.
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Measurements made during severe electrical storms reveal that lightning bolts can carry as much as 30 C of charge and can travel between a cloud and the ground in time intervals of around 100 μs (and sometimes even shorter). Potential differences have been measured as high as 400 million volts.
1)What is the current in such a lightning strike? (Express your answer to two significant figures.)
2)What is the resistance of the air during such a strike? (Express your answer to two significant figures.)
3)How much energy is transferred during a severe strike? (Express your answer to two significant figures.)
4)What mass of water at 100∘C could the lightning bolt in part (3) evaporate? The latent heat of vaporization of water at 100∘C is LV=2260 kJ/kg. (Express your answer to two significant figures.)
Measurements made during severe electrical storms reveal that lightning bolts can carry as much as 30 C of charge and can travel between a cloud and the ground in time intervals of around 100 μμs (and sometimes even shorter). Potential differences have been measured as high as 400 million volts.
1)What is the current in such a lightning strike? (Express your answer to two significant figures.)
2)What is the resistance of the air during such a strike? (Express your answer to two significant figures.)
3)How much energy is transferred during a severe strike? (Express your answer to two significant figures.)
4)What mass of water at 100∘C could the lightning bolt in part (3) evaporate? The latent heat of vaporization of water at 100∘C is LV=2260 kJ/kg. (Express your answer to two significant figures.)
Using this information, estimate the following quantities (a) total amount of charge transferred
between cloud and ground (b) the current in the lightning bolt (c) the power delivered in 0.2 s.
Given data:
Energy transferred U- 10° K
Voltage V 5 x 107 V
Time t=0.25
Charge q= ?
Current I=?
Power delivered in 0a?
Chapter 18 Solutions
COLLEGE PHYSICS
Ch. 18 - Prob. 1QAPCh. 18 - Prob. 2QAPCh. 18 - Prob. 3QAPCh. 18 - Prob. 4QAPCh. 18 - Prob. 5QAPCh. 18 - Prob. 6QAPCh. 18 - Prob. 7QAPCh. 18 - Prob. 8QAPCh. 18 - Prob. 9QAPCh. 18 - Prob. 10QAP
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