Q6.

Expert-verifiedFound in: Page 43

Book edition
7th

Author(s)
Douglas C. Giancoli

Pages
978 pages

ISBN
978-0321625922

According to the rule of thumb, every five seconds between a lightning flash and the following thunder gives the distance to the flash in miles.

(a) Assuming that the flash of light arrives in essentially no time at all, estimate the speed of the sound in m/s from this rule.

(b) What would be the rule for kilometers?

(a) The estimated value of the speed of the sound is .

(b) The rule for kilometers will be ‘every three seconds between a lightning flash and the following thunder gives the distance to the flash in kilometers.’

Given data.

There is a gap of five seconds between the lightning flash and the following thunder that gives the distance to the flash in miles.

So, the sound is traveling one mile in 5 seconds.

You know that .

Here, the distance traveled by the sound is 1 mile.

Now,

(a) Then,

Therefore, the estimated speed of the sound is .

(b) Let the sound take time to travel a distance of 1 km or 1000 m.

Then,

Therefore, the rule is ‘every three seconds between a lightning flash and the following thunder gives the distance to the flash in kilometers.’

94% of StudySmarter users get better grades.

Sign up for free