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
Strike441 [17]
3 years ago
14

Find the wavelength of the ultrasonic wave emitted by a bat if it has a frequency of 4.0 * 10^4 Hz.

Physics
2 answers:
Oliga [24]3 years ago
6 0

ultrasonic wave is a type of sound wave. speed of sound in air at room temp is 343m/s.

speed = wavelength * frequency

wavelength = speed / frequency = 343/4*10^4

= 0.00858m

= 8.58mm



morpeh [17]3 years ago
5 0

Remark

You have to pick a velocity for an ultra sound wave. I'm going to take the sound velocity to be 331 m/s in air, because I'm assuming that is what is meant: it is the sound a bat would make once he emits the ultrasound to a microphone like device that receives it. The media through which that happens is air.

Givens

v = 331m/s

f = 4 *10^4 hz

Formula

velocity = wavelength * frequency

v = \lambda*f

331/(4*10^4) =  \lambda

0.008275 =  \lambda

8.275*10^-3 =  \lambda

You might be interested in
The speed of light in a vacuum is approximately 2.99 × 108 m/s, and the speed of light through a piece of glass is approximately
exis [7]

Option (b) is correct.The index of refraction for the glass is 1.52

Explanation:

velocity of light in vacuum= C= 2.99 x 10⁸m/s

Velocity of light in glass = V= 1.97 x 10⁸m/s

The refractive index is given by n=\frac{c}{v}

n= 2.99 x 10⁸/1.97 x 10⁸m/s

n= 1.52

Thus the refractive index of glass is 1.52

6 0
3 years ago
Read 2 more answers
Which of the following is NOT true? a. The higher the moment of inertia, the greater the resistance to changes in angular veloci
kaheart [24]

Answer:

Explanation:

The moment of inertia is the integral of the product of the squared distance by the mass differential. Is the mass equivalent in the rotational motion

a) True. When the moment of inertia is increased, more force is needed to reach acceleration, so it is more difficult to change the angular velocity that depends proportionally on the acceleration

b) True. The moment of inertia is part of the kinetic energy, which is composed of a linear and an angular part. Therefore, when applying the energy conservation theorem, the potential energy is transformed into kinetic energy, the rotational part increases with the moment of inertia, so there is less energy left for the linear part and consequently it falls slower

c) True. The moment of inertial proportional to the angular acceleration, when the acceleration decreases as well. Therefore, a smaller force can achieve the value of acceleration and the change in angular velocity. Consequently, less force is needed is easier

4 0
3 years ago
Calculate the period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m
otez555 [7]

Answer: The period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.

Explanation:

Given: Mass = 5 kg

Spring constant = 6 N/m

Formula used to calculate period is as follows.

T = 2 \pi \sqrt\frac{m}{k}

where,

T = period

m = mass

k = spring constant

Substitute the values into above formula as follows.

T = 2 \pi \sqrt\frac{m}{k}\\= 2 \times 3.14 \times \sqrt\frac{5}{6}\\= 5.73 s

Thus, we can conclude that the period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.

5 0
3 years ago
Which best explains why sound travels faster through a solid
Masteriza [31]
Its because the molecules in the solid structures are very close to each other and rigidly packed, thus due to this quantum structure they have pretty awesome speed of sound in them
8 0
3 years ago
Read 2 more answers
WILL MARK BRAINIEST!!!!!! (Fill in the blanks with the possible answers at the bottom)
Svetllana [295]

Answer:

Yet Yeet and Yeeeeeet

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • How does the suns energy contribute to the carbon cycle
    15·1 answer
  • There have been several proposed atomic models during the last 150 years. Which model best illustrates the Bohr model. This mode
    10·2 answers
  • In which place moutain or terai,the value of g is more and why?​
    10·1 answer
  • 3. A train has broken through the wall of a train station. During the collision, what can be said about the force exerted by the
    15·1 answer
  • What r photons? <br> ........................,........,..........
    11·2 answers
  • A metaphor is:
    5·1 answer
  • Stars of spectral type A and F are considered ________.
    10·1 answer
  • Robebobeccoba fires a bullet from a gun while aiming at a target 149 m away. If the
    5·1 answer
  • A tumble buggy travels on the ground for 8 seconds and travels 4 meters. What<br> was its speed?
    7·1 answer
  • Inez uses hairspray on her hair each morning before going to school. The spray spreads out before reaching her hair partly becau
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!