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
Vlad [161]
3 years ago
15

A model airplane traveling at 5 m/s approaches you. The frequency of the hum produced by the motor is 652 Hz. Assume the speed o

f sound to be 342 m/s. What is the observed frequency of the hum?
643 Hz
647 Hz
657 Hz
662 Hz
Physics
1 answer:
iogann1982 [59]3 years ago
8 0
To calculate the frequency change of a moving source, the formula used is:

f = c*fo/(c+Vs)

where:
f = frequency observed
c = speed of sound
Vs = speed of source (positive if it's moving away from observer and negative if it is moving towards the observer)
fo = emitted frequency of the source

f = 342*652/(342-5)
f = 661.67 Hz or 662 Hz --> FINAL ANSWER
You might be interested in
Which process can transfer energy to a solid metal block
gladu [14]
Eneregy is the ability to to do work it takes work to heat someone heat is energy put the solid metal block in a campfire and heat it up tada wait, we need the options, nevermind
4 0
3 years ago
Read 2 more answers
What does the energy hill represent on an energy diagram?
creativ13 [48]

Answer:

In my opinion I think the answer is C you don't have to choose C

8 0
3 years ago
Explain why you cannot use mass or volume alone to identify substances.
Alex17521 [72]
Objects can have the same mass (but different <span>compositions). Only mass or volume cannot tell you if the object is solid or vo</span>lumes) or same volume (but different masses) 

4 0
3 years ago
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amp
Paraphin [41]

Answer:

796.18 Hz

Explanation:

Applying,

Maximum velocity = Amplitude×Angular velocity

Therefore,

V' = A(2πf)............... Equation 1

Where V' = maximum velocity of the eardrum, A = Amplitude of vibration of the eardrum, f = frequency of the eardrum vibration, π = pie

make f the subject of the equation

f = V'/2πA................ Equation 2

From the question,

Given: V' = 3.6×10⁻³ m/s, A' = 7.2×10⁻⁷ m,

Constant: 3.14.

Substitute these values into equation 2

f = 3.6×10⁻³/( 7.2×10⁻⁷×2×3.14)

f = 796.18 Hz

6 0
3 years ago
A 50.0-kg girl stands on a 9.0-kg wagon holding two 13.5-kg weights. She throws the weights horizontally off the back of the wag
Kobotan [32]
Do you still need help with this question??
5 0
3 years ago
Other questions:
  • Which of these is a contact force?
    6·2 answers
  • NEED ANSWER ASAP
    11·2 answers
  • A heavy boy and a lightweight girl are balanced on a massless seesaw. The boy moves backward, increasing his distance from the p
    6·1 answer
  • 275mm=cm conversions
    13·2 answers
  • What does a ‘0’ mean in binary code?
    9·1 answer
  • Please answer giving all my points for it
    8·2 answers
  • Physical therapists know as you soak tired muscles in a hot tub, the water will cool down as you heat up. If a 67.9 kg person at
    7·1 answer
  • Nerf this hbhbhbbhbbhbhbhbhbhbhb
    11·2 answers
  • Please help! this is timed!
    14·2 answers
  • A volleyball that has an initial momentum of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!