YumYum247
  • YumYum247
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Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
YumYum247
  • YumYum247
@Astrophysics Your highness, please guide me through this problem, Thanks in advance!!! :")
YumYum247
  • YumYum247
i'm getting 257Hz
YumYum247
  • YumYum247
V = d/t = 12/6 = 2Hz Fb = F1-F2 2Hz = f1- 255Hz 2Hz = f1+255Hz +255Hz = f1 257Hz = f1 or other possibility Fb = F1+ F2 2Hz = F1 - 255Hz -253Hz = F1

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YumYum247
  • YumYum247
257Hz?
Astrophysics
  • Astrophysics
How does distance over time give you 2Hz??
Astrophysics
  • Astrophysics
Can you fix your question as well
YumYum247
  • YumYum247
LOL....:"D F = N/Change in time F = 12 cycles/ 6 sec F = 2cycles persecond!!!
Astrophysics
  • Astrophysics
What is this? `It is sounded again with tuning fir 2`
YumYum247
  • YumYum247
1 Attachment
YumYum247
  • YumYum247
that question is the follow up of the previous question.....
YumYum247
  • YumYum247
the beat efficiency was 1Hz
YumYum247
  • YumYum247
for the second part, they tie the first tuning fork 1 (256Hz) to reduce it's freqency and sound it with fork number 2 (255Hz).
YumYum247
  • YumYum247
"FORK 2"|dw:1436222090799:dw|
Astrophysics
  • Astrophysics
\[f = \frac{ 12 beats }{ 6 \sec } = 2 hz\]
YumYum247
  • YumYum247
so is that the "NEW FREQUENCY" of FORK 1?????
YumYum247
  • YumYum247
NO that's the beat frequency!!!
YumYum247
  • YumYum247
when you hear woo woo woo woo in the wave, that's that....
Astrophysics
  • Astrophysics
\[2Hz = |f_2 - 255 Hz|\] so we have 2 cases then \[\pm 2Hz = f_2 - 255Hz\] now solve for both cases what do you get
YumYum247
  • YumYum247
i did, there are two possibilities, first is 257Hz and the other is -253Hz
Astrophysics
  • Astrophysics
You should say 253 and 257, remember what I told you earlier about absolute values
YumYum247
  • YumYum247
but it doesn't make sense for a sec because when you tie a tuning fork with a rubber it's frequency shold drop, not increase!!!!
YumYum247
  • YumYum247
am i right.
Astrophysics
  • Astrophysics
Yeah, so which one is it then?
YumYum247
  • YumYum247
let's say i have a tuning fork and i tie it with a rubber band.....and sound it with another fork, shouldn't its freqency drop because it's arms are tied together
Astrophysics
  • Astrophysics
Yes, we already know the frequency for 1 reduces, that's why we have to pick the right case :)
YumYum247
  • YumYum247
|dw:1436222480252:dw|
YumYum247
  • YumYum247
so one case gives me a higher frequency and the second one gives me a negative freqency. which one is it
YumYum247
  • YumYum247
-253Hz
Astrophysics
  • Astrophysics
Again, I've told you this many times, we can't have the negative frequency, remember the absolute value signs.
YumYum247
  • YumYum247
i know but the other option gives us a higher freqency than the original frequency....
Astrophysics
  • Astrophysics
You should be saying 253 Hz, not -253 Hz, you can't have a negative frequency
YumYum247
  • YumYum247
initially fork 1 was produing a 256Hz but after tieing it with a rubber band, it produces a frequency of 257Hz ?!?!?!?
YumYum247
  • YumYum247
Oh MY GOD.....are you cereal?
YumYum247
  • YumYum247
so that's why...LOL :"D i feel stpid for a sec
YumYum247
  • YumYum247
so the freak is 253Hz cuz we can't have a negative freak..... it even applies here???
Astrophysics
  • Astrophysics
\[2 = |f_2 - 255|\] This means \[\pm 2 = f_2 - 255\] the first case \[+2 = f_2 - 255 \implies 255+2 = f_2 \implies 257 = f_2\] the other case gives us \[-2 = f_2 - 255 \implies f_2 = 255-2 = 253 Hz\]
YumYum247
  • YumYum247
253 is the right... i got it...!!! LOL Luv you man, i'd have never learnt that with out you!!
Astrophysics
  • Astrophysics
No problem, frequency can never be negative, just remember the absolute value makes the negative into a positive.
YumYum247
  • YumYum247
got it boss!!!!!
Astrophysics
  • Astrophysics
You can learn more about it here: http://www.mathsisfun.com/numbers/absolute-value.html
YumYum247
  • YumYum247
aight thanks

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