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
-Dominant- [34]
3 years ago
9

A hawk flying at 38 m/s emits a cry whose frequency is 440 Hz. A wren is moving in the same direction as the hawk at 17 m/s. (As

sume the speed of sound is 343 m/s.) (a) What frequency does the wren hear (in Hz) as the hawk approaches the wren? Hz (b) What frequency does the wren hear (in Hz) after the hawk passes the wren?
Physics
1 answer:
Natasha_Volkova [10]3 years ago
3 0

Answer:

frequency wren hear when approaches is 470.29 Hz

frequency wren hear after hawk pass is 415.75 Hz

Explanation:

given data

hawk  velocity Vs= 38 m/s

frequency f = 440 Hz

wren velocity Vo= 17 m/s

speed of sound s = 343 m/s

to find out

What frequency wren hear and What frequency wren hear after hawk pass

solution

we apply here frequency formula that is

f1=f ( \frac{s+V_o}{s+V_s} )    .........1

here f1 is frequency hear by observer

put here all value as Vo and Vs negative because it approaches

f1=f ( \frac{s-V_o}{s-V_s} )  

f1=440 ( \frac{343-17}{343-38} )  

f1 = 470.29 Hz

so frequency wren hear when approaches is 470.29 Hz

and

after passing from equation 1 we take both Vo and Vs as positive

f1=f ( \frac{s+V_o}{s+V_s} )

f1=440 ( \frac{343+17}{343+38} )

f1 = 415.75 Hz

so frequency wren hear after hawk pass is 415.75 Hz

You might be interested in
PLEASE HELP WILL GIVE BRAINLIEST In an experiment, the hypothesis is that if leaf color is related to temperature, then exposing
Andrei [34K]

Answer:

testable

Explanation:

high heat can cause browning and or welting

8 0
3 years ago
Read 2 more answers
Mrs. Walker has on new shoes! When she walks down the waxed hall floors she slips and slides. What could Mrs. Walker do to help
givi [52]
She could choose to wear shoes designed to have more friction on the bottom, so she won’t slip as easily... (or she could get like a walker or something to hold onto if she really wanted to show off her new shoes)
Hope this helps x
3 0
3 years ago
What is chemical stimuli
navik [9.2K]
Chemical stimuli are molecules that cause a response at a cellular level primarily through cellular receptors. This happens all the time in nature - cells communicate with one another through chemical messaging. An example is an aroma molecule, such as the scent from a flower. This particular molecule is detected by the olfactory cells (those associated with the sense of smell) in your nose, producing a chemical reaction that ultimately leads to you consciously experiencing the smell.
7 0
4 years ago
Read 2 more answers
What is <br> general education
ddd [48]
Please follow me and mark me as brainiest

7 0
3 years ago
What is formula of perimeter of half circle​
OLga [1]

1/2 × 2 × pie × radius

= pie × radius

6 0
3 years ago
Other questions:
  • In an experiment, a torque of a known magnitude is exerted along the edge of a rotating disk. The disk rotates about its center.
    6·1 answer
  • Is there more than one kind of balance used in a laboratory
    9·1 answer
  • How does an increase in thermal energy affect molecules?
    14·2 answers
  • A scientist is creating a new synthetic material. The material’s density is 6.1 g/cm3. Which sentences describe how the scientis
    14·2 answers
  • Will give BRAINEST to the person who answers right
    8·2 answers
  • The angle between the two force of magnitude 20N and 15N is 60 degrees (20N force being horizontal) determine the resultant in m
    6·1 answer
  • You split wood with an ax. How would you change the ax to make splitting the wood easier? You would increase mechanical advantag
    7·2 answers
  • How many laws of energy are there
    9·2 answers
  • HELP!!! Why is plasma considered the most common state of matter in the universe?
    14·2 answers
  • 1.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!