EBK WEBASSIGN FOR KATZ'S PHYSICS FOR SC
EBK WEBASSIGN FOR KATZ'S PHYSICS FOR SC
1st Edition
ISBN: 9781337684651
Author: Katz
Publisher: VST
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Chapter 2, Problem 25PQ

During a thunderstorm, a frightened child is soothed by learning to estimate the distance to a lightning strike by counting the time between seeing the lightning and hearing the thunder (Fig. P2.25). The speed vs of sound in air depends on the air temperature, but assume the value is 343 m/s. The speed of light c is 3.00 × 108 m/s.

a. A child sees the lightning and then counts to eight slowly before hearing the thunder. Assume the light travel time is negligible. Estimate the distance to the lightning strike.

b. Using your estimate in part (a), find the light travel time. Is it fair to neglect the light travel time?

c. Think about how time was measured in this problem. Is it fair to neglect the difference between the speed of sound in cold air (vs at 0°C = 331.4 m/s) and the speed of sound in very warm air (vs at 40°C = 355.4 m/s)?

Chapter 2, Problem 25PQ, During a thunderstorm, a frightened child is soothed by learning to estimate the distance to a

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Chapter 2 Solutions

EBK WEBASSIGN FOR KATZ'S PHYSICS FOR SC

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