Exercise 6: To estimate a distance at which a thunderstom takes place, a person measures the difference in time between the seeing the light and hearing the thunder . He finds that the time difference is 5 sec corresponds to the distance 1.7 Km. Is he right? Why?

No, he is not right. The speed of sound is approximately 343 meters per second (m/s) at sea level and at a temperature of 20 degrees Celsius (68 degrees Fahrenheit). This means that sound travels through the air at a speed of about 1.125 kilometers per second (1 km/s = 1,000 m/s / 343 m/s).<br /><br />To estimate the distance to the thunderstorm, we can use the time difference between seeing the lightning and hearing the thunder. If the time difference is 5 seconds, then the distance to the thunderstorm would be:<br /><br />Distance = Speed of Sound x Time<br />= 1.125 km/s x 5 s<br />= 5.625 km<br /><br />Therefore, the person is not right. The distance to the thunderstorm is approximately 5.625 kilometers, not 1.7 kilometers.