Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
1st Edition
ISBN: 9780078945830
Author: Charles William McLaughlin, Marilyn Thompson, Dinah Zike
Publisher: Glencoe Mcgraw-Hill
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Chapter 10, Problem 11STP
To determine

After how long the crack of the bat and ball is heard.

Expert Solution & Answer
Check Mark

Answer to Problem 11STP

Thetime taken is, t=1 s .

Explanation of Solution

Given:

The speed of sound in air is 340 m/s and the distance to the home plate is 170 m.

Formula used:

The expression for time, speed and distance is,

  v=dt…… (1)

Here, v is the speed of sound, d is the distance travelled by the sound and t is the time taken.

For an echo to be recorded it has to travel towards the object and reflect back to the source, hence the total distance is twice the distance, d =2× d

Calculation:

Substituting 340 m/s second in v and 2×170 m in d in equation (1),

  340=2×170tt=1 s

Conclusion:

Hence, the time taken is, t=1 s .

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