HomeworkLib
Question

A bat flying at 4.10 m/s is chasing an insect flying in the same direction. If...

A bat flying at 4.10 m/s is chasing an insect flying in the same direction. If the bat emits a 40.0-kHz chirp and receives back an echo at 40.4 kHz, what is the speed of the insect? (Take the speed of sound in air to be 340 m/s.)
_______m/s

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Relative velocity of a bat and an insect (Rv)
f=emits frequency , fo=echo frequency.
Rv= v(fo-f)/(fo+f) [m/s] , (v=343m/s , f=40.0kHz , fo=40.4kHz)
Rv= 340(40.4-40.0)/(40.4+40.0)
Rv= 340*0.4/80.4= 1.691m/s
vi= bat speed-Rv
vi= 4.10-1.691= 3.648= 2.40[m/s] (insect away speed)

0 0
Add a comment
Know the answer?
Add Answer to:
A bat flying at 4.10 m/s is chasing an insect flying in the same direction. If...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A bat flying at 3.00 m/s is chasing an insect flying away from it at a...

    A bat flying at 3.00 m/s is chasing an insect flying away from it at a speed of 5.00 m/s. The bat emits a 40.0 kHz chirp which is detected by the insect. What is the frequency of sound detected by the insect, assuming that the insect can actually “hear” the chirp emitted by the bat? (The speed of sound in air is 343 m/s.)

  • please answer question showing all steps and formulas A bat flying at 4.85 m/s is chasing...

    please answer question showing all steps and formulas A bat flying at 4.85 m/s is chasing an insect flying in the same direction. The bat emits a 39.9-kHz chirp and receives back an echo at 40.6 kHz. (Take the speed of sound in air to be v = 343 m/s.) (a) What is the speed of the insect? Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake...

  • A bat, flying at 20.0 m/s, emits a chirp at 40.0 kHz. If this sound pulse...

    A bat, flying at 20.0 m/s, emits a chirp at 40.0 kHz. If this sound pulse is reflected by a wall, what is the frequency of the echo received by the bat? (V sound = 340 m/s. unit in kHz) 

  • A bat, flying at 4.9 m/s, pursues an insect that is flying at 1.1 m/s in...

    A bat, flying at 4.9 m/s, pursues an insect that is flying at 1.1 m/s in the same direction. The bat emits a 47000-Hz sonar pulse. Take the speed of sound to be 343 m/s. At what frequency, in hertz, does the bat hear the pulse reflected back from the insect?

  • A bat is chasing a flying bug. The bat is moving at 4.50 m/s, and can...

    A bat is chasing a flying bug. The bat is moving at 4.50 m/s, and can only see the bug when the wavelength is larger than its 40.0 kHz chirp. a. What is the smallest size bug the bat can see on a 18°C night? (Answer: 8.54 mm) b. The bat hears an echo at 40.3 kHz off the bug. What is the speed of the bug? (Answer: 3.2 m/s) c. Will the bat be able to catch up with...

  • A bat, flying at 4.70 m/s toward a wall, emits a chirp at 50.0 kHz. If...

    A bat, flying at 4.70 m/s toward a wall, emits a chirp at 50.0 kHz. If the wall reflects this sound pulse, what is the frequency, in kHz, of the echo received by the bat? (vsound = 340 m/s)

  • 1. A bat emits a sound at a frequency of 12 kHz as it approaches a...

    1. A bat emits a sound at a frequency of 12 kHz as it approaches a wall. The bat detects beats such that the frequency of the echo is 860 Hz higher than the frequency the bat is emitting. The speed of sound in air is 340 m/s. The speed of the bat is closest to 2. A supersonic plane passes overhead at a speed of 823 m/s. If you hear the sonic boom (shock wave) 4 s after the...

  • A bat can detect small objects such as an insect whose size is approximately equal to...

    A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 54.5 kHz, and the speed of sound in air is 339 m/s, what is the smallest insect a bat can detect?

  • 009 10.0 points A bat can detect small objects such as an insect whose size is...

    009 10.0 points A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 26.2 kHz, and the speed of sound in air is 334 m/s, what is the smallest insect a bat can detect? Answer in units of mm.

  • 3. A bat flying toward a wall at 6.0m/s emits a sound at a frequency of...

    3. A bat flying toward a wall at 6.0m/s emits a sound at a frequency of 35kHz. What is the frequency of the echo (sound reflected by the wall back to the bat) that the bat hear? Assume the speed of sound to be 343m/s.

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT