2 a A girl stands 160 m away from a high wall and clapsher hands at a steady rate so that each clap coincideswith the echo of the one before. If she makes 60claps in 1 minute, what value does this give for thespeed of sound?b If she moves 40 m closer to the wall she finds theclapping rate has to be 80 per minute. What valuedo these measurements give for the speed of sound?c If she moves again and finds the clapping ratebecomes 30 per minute, how far is she from the wallif the speed of sound is the value you found in a?

Question
Asked Jan 18, 2020
27 views
2 a A girl stands 160 m away from a high wall and claps
her hands at a steady rate so that each clap coincides
with the echo of the one before. If she makes 60
claps in 1 minute, what value does this give for the
speed of sound?
b If she moves 40 m closer to the wall she finds the
clapping rate has to be 80 per minute. What value
do these measurements give for the speed of sound?
c If she moves again and finds the clapping rate
becomes 30 per minute, how far is she from the wall
if the speed of sound is the value you found in a?
help_outline

Image Transcriptionclose

2 a A girl stands 160 m away from a high wall and claps her hands at a steady rate so that each clap coincides with the echo of the one before. If she makes 60 claps in 1 minute, what value does this give for the speed of sound? b If she moves 40 m closer to the wall she finds the clapping rate has to be 80 per minute. What value do these measurements give for the speed of sound? c If she moves again and finds the clapping rate becomes 30 per minute, how far is she from the wall if the speed of sound is the value you found in a?

fullscreen
check_circle

Expert Answer

Step 1

Part (a): Distance between the girl and the wall = 160 m

Frequency of the clap = 60/60 = 1HZ

Step 2

Wavelength of the clap = (distance covered by sound to going to wall + distance covered by sound to coming back from the wall)

λ = 2 X 160 = 320 m

Speed of sound can be calculated as:

Physics homework question answer, step 2, image 1
fullscreen
Step 3

Part (b): Distance between the girl and the wall = 160 – 40 =120 m

Wavelength = ...

Physics homework question answer, step 3, image 1
fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: A 500-gram ball thrown vertical upward from the surface of earth with the initial velocity 10 m/s2. ...

A: Click to see the answer

question_answer

Q: A car initially moving at 30 m/s begins accelerating at 5 m/s2. How far does the vehicle travel afte...

A: Step 1It is given that

question_answer

Q: Calculate the diameter for a capilllary tube in which mercury is depressed by 1.21cm, Given surface ...

A: The formula for the rise in the capillary tube denoted by h is given by Jurin’s Law which is express...

question_answer

Q: Differentiate between Concave and Convex lens.

A: The concave lens is the diverging lens and its structure is thinner at middle and thicker at its edg...

question_answer

Q: which of the equations for motion with constant acceleration produce a straight line when graphed? w...

A: Newton’s equation of motion which gives straight line on plotting is,

question_answer

Q: A piece a wood of relative density 0.25 floats in a beaker containing oil of relative density 0.81, ...

A: Let the volume of the wood be V and v is the volume of the mood inside.The density of the wood is gi...

question_answer

Q: Why is it not possible to separate two pieces of paper joined by glue or gum?

A: The adhesive force between glue and paper molecules is much greater than the adhesive force between ...

question_answer

Q: The difference between the length of a certain brass rod that of a steel rod is claimed to be consta...

A: Given:The difference between length difference will be same for all temperature for brass rod and st...

question_answer

Q: Three balls (labeled A, B, C) are placed into two different boxes (1 and 2), as in (Figure 1). If al...

A: Total number of cases,