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
netineya [11]
3 years ago
8

15 beats are heard in 5 seconds when a piano key and a tuning fork of slightly higher frequency (440 Hz) are struck at the same

time. What is the frequency of the sound emitted by the piano key?
Physics
1 answer:
chubhunter [2.5K]3 years ago
6 0

Answer:

437Hz

Explanation:

if two sound waves have a little difference in frequencies f_{a}     and f_{a}       interfere, the resulting sound wave produces a beat.

Given:

f_{a}=440Hz

 f_{b}=frequency\ of\ the\ sound\ emitted by\ the\ piano\ key

f_{beat}=frequency\ of\ beat

where

f_{beat}=\frac{number\ of\ beat}{time}

f_{beat}=\frac{15beats}{5}=3Hz

f_{beat}=f_{a}-f_{b}

f_{b}=f_{a}-f_{beat} = 440Hz - 3Hz = 437Hz

You might be interested in
An elephant produces a 10Hz sound wave. Assuming the speed of sound in air is 344/s, determine the wavelength of this infrasonic
user100 [1]

Answer:

34.5 m

Explanation:

Given data : An elephant produces 10 Hz sound wave. Assuming the speed of sound in air is 345 m/s. To find : What is the wavelength of sound ? Answer : The wavelength of the sound is 34.5 m.

4 0
2 years ago
Net force is the sum of all the forces acting on an object. If a spring balance pulls on a body with a force of 10 N, and fricti
julsineya [31]

Answer:

5N

Explanation:

(25 N - 20 N = 5 N)

3 0
3 years ago
Why is the law of buoyancy considered a law?
solong [7]

Answer:

Explanation:

because it is a function of physics that will always be true, hope this helps :)

4 0
3 years ago
Please help me with this<br> 10 points <br> all i have rn :/<br> thanks &lt;3
Korolek [52]

Answer: c the last one

Explanation:

6 0
3 years ago
Read 2 more answers
A SMA wire in the un-stretched condition is then given an initial strain of εo (to preload the wire) at room temperature (RT). I
julia-pushkina [17]

Answer: tensional force

Explanation:

Tension force on a material occurs when two equal forces act on a material in an opposite direction away from the ends of the material.

Pre-tensing a wire material increases its load bearing capacity and reduces its flexure.

6 0
3 years ago
Other questions:
  • The moon is smaller and more dense than the Earth, and has less extreme temperature changes.
    11·2 answers
  • assuming that there are no outside forces, what will happen if two neutral atoms are placed 1 M apart in a vacuum. a)the atoms w
    13·1 answer
  • 1. A student is biking to school. She travels 0.7 km north, then realizes something has fallen out of her bag.
    6·1 answer
  • A 5.7 kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface. At time t = 0s, the bl
    11·1 answer
  • A good way to de-magnetize something is to___.
    7·2 answers
  • A 60 kilogram student jumps down from a laboratory counter. At the instant he lands on the floor hus speed is 3 meters per secon
    14·1 answer
  • The AB rope is fixed to the ground at its A end, and forms 30º with the vertical. Its other end is connected to two ropes by mea
    11·1 answer
  • Pedro uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples.
    11·2 answers
  • Where does reduction occur in an electrolytic cell
    7·1 answer
  • A student stands with both feet on some scales in order to measure his weight.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!