1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
leonid [27]
3 years ago
6

A bat at rest sends out ultrasonic sound waves at 46.2 kHz and receives them returned from an object moving directly away from i

t at 21.8 m/s, what is the received sound frequency?
f= ? Hz
Physics
1 answer:
murzikaleks [220]3 years ago
4 0

Answer:

f" = 40779.61 Hz

Explanation:

From the question, we see that the bat is the source of the sound wave and is initially at rest and the object is in motion as the observer, thus;

from the Doppler effect equation, we can calculate the initial observed frequency as:

f' = f(1 - (v_o/v))

We are given;

f = 46.2 kHz = 46200 Hz

v_o = 21.8 m/s

v is speed of sound = 343 m/s

Thus;

f' = 46200(1 - (21/343))

f' = 43371.4285 Hz

In the second stage, we see that the bat is now a stationary observer while the object is now the moving source;

Thus, from doppler effect again but this time with the source going away from the obsever, the new observed frequency is;

f" = f'/(1 + (v_o/v))

f" = 43371.4285/(1 + (21.8/343))

f" = 40779.61 Hz

You might be interested in
A runner runs 2.0 km in 5.0 minutes
Nadya [2.5K]

Answer: What is this supposed to be converted into?

Explanation:

4 0
3 years ago
Read 2 more answers
2. A solid plastic cube of side 0.2 m is submerged in a liquid of density 0.8 hgm calculate the
kotegsom [21]

Answer:

vpg = 0.064 N

Explanation:

Upthrust = Volume of fluid displaced

upthrust liquid on the cube g=10ms−2

vpg =0.2 x 0.2 x 0.2 x0.8 x 10= 0.064N

vpg = 0.064 N

hope it helps.

3 0
3 years ago
Which statement best explains how isotopes can have different masses and still be the same element?
ss7ja [257]

Your list of choices is a very short list, and doesn't include any
correct explanation.

The mass of an atom is roughly the number of protons AND neutrons
in its nucleus, but the element only depends on how many protons are there. 

Different atoms of the same element may have different numbers of
neutrons, so their masses are different.  But they're the same element,
because they all have the same number of protons.

3 0
3 years ago
If you are following a car and also being tailgated by another vehicle, your best option would be to.. a. Increase the following
Pie

Answer:

Your answer here is D

Explanation:

Slowly pressing your breaks will help ensure you are not hit by the other car. If they hit you its their fault. Hope this helps :)!

7 0
3 years ago
Read 2 more answers
Benita is studying the erosion of soil after a heavy rainfall. She observes that rainwater washes away very little soil from are
yanalaym [24]

Answer:

yes bc it washed it away so

Explanation:

(:

4 0
2 years ago
Other questions:
  • To calculate the amount of energy transferred by heat to or from an object you must know the mass of the object and what else??
    11·1 answer
  • he tune-up specifications of a car call for the spark plugs to be tightened to a torque of 47 N⋅m . You plan to tighten the plug
    5·1 answer
  • Would hurt if u have a baby?
    12·2 answers
  • A sound wave traveling eastward through air
    8·2 answers
  • Suppose that the hatch on the side of a Mars lander is built and tested on Earth so that the internal pressure just balances the
    9·1 answer
  • A semi has a net force of 13,000 N and is accelerating at a rate of 6.5 m/s^2. What is the mass of the semi? *
    14·1 answer
  • Why do white gassy stuff come out of planes?
    11·1 answer
  • The Large Hadron collider (LHC) is a huge piece of equipment designed and built in order to make new scientific discoveries. The
    9·1 answer
  • Join dua-odmb-pwp meet plßsssssss​
    12·1 answer
  • From eight weeks after conception until birth, the developing fertilized egg is called an
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!