Question

Suppose you call out at a rocky cliff that is 550m away, and receive an echo in 3.3 seconds. What is the wavelength of the sound you created if its frequency is 210Hz?

Answer #1

Given that cliff is 550 m away

Time taken for echo to return, T = 3.3 sec

T = t1 + t2

t1 = time taken for sound to reach the cliff

t2 = time taken by echo to return to you from cliff

since both time sound have to travel same distance at same speed, So

t1 = t2

t1 + t2 = 3.3 sec

t1 = 3.3/2 = 1.65 sec

Now we know that

speed = distance/time

Speed of sound = 550/1.65 = 333.33 m/sec

Now we know that

wavelength = speed of sound/frequency

wavelength = 333.33/210 = 1.59 m

Please Upvote.

While out on a call for GERMS, an EMT hears the sound of an
ambulance approaching. The EMT is completely stationary. It is
quite an emergency, so the ambulance is approaching at 55 mph and
emitting its siren at a frequency of 1200 Hz. (a) What is the
frequency heard by the EMT? (b) What is the frequency heard by the
hospital away from which the ambulance is moving? (c) What is the
frequency of the echo off the hospital...

A siren emitting a sound of frequency 1000 Hz moves towards you,
and away from a cliff at a speed of 25 m/s. a) what is the
frequency of sound you heard coming directly to you from the siren?
B) what is the frequency of sound you hear reflected from the
cliff? (speed of sound = 340 m/s).

A stone is dropped from the top of a cliff. The splash it makes
when striking the water below is heard 3.2 s later. How high is the
cliff?
2. The pressure variation is a sound wave is given by Δ P =
0.0035 sin (0.38 π x – 1350 π t) Determine a. the wavelength b. the
frequency c. the speed and d. the displacement amplitude of the
wave. Assume the density of the medium to be 2.2 x...

Suppose you are driving a vehicle at a speed of 60km/hr and sound the horn that emits a frequency of 320hz. If the vehicle approaches a wall that causes the sound to be reflected. What will be the new echo frequency received by you inside the car? (You can ignore the interference between the wave back and forth)

Suppose you are stopped for a traffic light, and an ambulance
approaches you from behind with a speed of 18.5 m/s. The siren on
the ambulance produces sound with a frequency of 959 Hz as measured
when you are at rest relative to the ambulance. The speed of sound
in air is 343 m/s. What is the wavelength of the sound reaching
your ears?

a. A guitar string is vibrating with a wave having a wavelength
of 1.6 m. This string has a linear mass density of 20 g/m. If the
tension holding the string is 7500 N, what is the frequency pitch
of the sound produced? Answer in 2 decimal places, and units
assumed in Hz.
b. Echolocation is a technique used by some animals such as
bats, whales and dolphins to assess their surroundings without
using vision. A whale gets too far...

You receive a telephone call from an attorney who needs an
expert witness for a business damages case. The attorney represents
the plaintiff (the injured party). You determine right away that
you have no conflicts of interest with any of the parties and carry
on with the initial discussion about the case. You learn that the
lawsuit involves two companies that had a business relationship.
Firm P had a contract with Firm D to sell goods, and the attorney
tells...

A bolt of lightening strikes a building in the city. You are on
top of a hill 15 km away.
1. How much longer does it take the sound of the thunder created
by the lightning to reach your ears than the light from the
lightning to reach your eyes if the sound waves travel at a speed
of 363 m/s and light travels at a speed of c = 3.00 x 108 m/s?
2. If the dominant frequency of...

⦁ A person sitting in a stationary boat notices that
it takes the water waves 2 seconds to pass the entire length of the
boat that is 12 m. Calculate the speed of the water waves. Show
your calculation.
12/2 = 6m/s
⦁ The person in Question #1 also notices the water
waves passing by the bow of the ship once every 4 seconds. b) What
are the frequency and c) the wavelength of the water waves? Show
all your...

You have a 1 W light bulb in your lab. It puts out light
of only 1 frequency. The wavelength of this light is 500nm. you set
up a detector with a surface area of 1 square cetimeter facing the
light source at a distance of 100m.
1.) find the number of photons hitting the detector every
second.
2.) what is the maximum E field of the E M wave hitting the
detector? Answer in mN/C.
3.) what is the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 32 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago