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.
Answers
Grinsen bat speed > 7. m/s + VG moth speed - s.amle + Vm bath sound wave = 50.7 Hz + fo (W now the weave is reflected from the moth, S also for (it rom) (it het moth = 343 x so. 7 i 7.2 343) loisi6 E x 50.7 → 0.979 & 59.57 Hz so foot . ( x 52.57 → 1.02099 Moom 0.984839 XS.SI → 54.5 H3 ans (a) 55.4 . 1+ t. 343 34 3 1.032166 - hanno X 52:57 $ 343 - Ym In many *32.57 $ 1.09716 * ugas CS Scanned with : ÇamScanner 3 54.633 - 1.032166 Vm = 343 11.033 = 1.032166 Von = 10.7 m l Ans (61
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