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# Hint for Part A: Hint for Part B: 1323 A bat flies towards a moth at...

## Question

###### Hint for Part A: Hint for Part B: 1323 A bat flies towards a moth at...

Hint for Part A:

Hint for Part B:

1323 A bat flies towards a moth at 7.2 m/s while the moth is flying towards the bat at 5.2 m/s. The bat emits a sound wave of 50.7 kHz. NOTES IMAGES DISCUSS UNITS STATS HELP PREFERENCES Part Description Answer Save Status 4 What is the frequency of the wave detected by the bat after the wave reflects off the moth? (include units with answer) Format Check 10 pts. 110% # tries: 0 Show Details 2% try penalty Hints: 1,0 10 pts. 110% After enjoying a tasty meal of the first moth, the bat goes after another moth. Flying with the same speed and emitting the same frequency, this time the bat detects a reflected frequency of 55.4 kHz. How fast is the second moth moving? (include units with answer) # tries: 0 Show Details Format Check 2% try penalty Hints: 1,0
Hint #1: There are two Doppler shifts: one when the wave is relfected off the moth, and one when the reflected wave is received by the bat.
Hint #1: Use the formulas from part A and a solver (calculator, Excel, or Matlab) to avoid the algebra.

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