×
Get Full Access to Conceptual Physics - 12 Edition - Chapter 20 - Problem 30e
Get Full Access to Conceptual Physics - 12 Edition - Chapter 20 - Problem 30e

×

# A rule of thumb for estimating the distance in kilometers ISBN: 9780321909107 29

## Solution for problem 30E Chapter 20

Conceptual Physics | 12th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants Conceptual Physics | 12th Edition

4 5 1 303 Reviews
26
0
Problem 30E

A rule of thumb for estimating the distance in kilometers between an observer and a lightning stroke is to divide the number of seconds in the interval between the flash and the sound by 3. Is this rule correct? Defend your answer.

Step-by-Step Solution:

Solution 30E Step 1 of 2: The speed of sound in air is about 333 m/s, whereas the speed of light is 3 million m/s ( 3 × 10 m/s). Which means , for most of the practical cases, the speed of light is instantaneous. Therefore, we see the flash at the same instant when it happens, whereas the sound travels at 333m/s , we hear the sound later. To travel 1 kilometer, sound takes 3 seconds, 1000 m 333 m/s 3 seconds Therefore, the approximate rule (3 seconds per kilometer) is correct.

Step 2 of 2

## Discover and learn what students are asking

Calculus: Early Transcendental Functions : Linear Models and Rates of Change
?In Exercises 5-10, plot the pair of points and find the slope of the line passing through them. (3,-5), (5,-5)

Calculus: Early Transcendental Functions : Basic Differentiation Rules and Rates of Change
?Finding a Derivative In Exercises 3–24, use the rules of differentiation to find the derivative of the function. $$y=x^{7}$$

Unlock Textbook Solution