1

- YumYum247

1

- chestercat

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- YumYum247

Let me try my luck first.....

- YumYum247

319Hz?

- YumYum247

idk:(

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## More answers

- Astrophysics

Your beat frequency is just changed

- Astrophysics

but the steps are initially the same

- YumYum247

from 2 to 1Hz???????

- Astrophysics

Yup

- YumYum247

give me a hint please.

- Astrophysics

\[1 Hz = |f_2-f_1|\]

- YumYum247

that's what i was using OMG!!!

- YumYum247

Awwwwnnnn!!! :"(

- Astrophysics

lol

- Astrophysics

What did we get for frequency b

- Astrophysics

322 and 318?

- YumYum247

both are viable

- YumYum247

but i guess 322Hz seems legit to me.

- Astrophysics

I got it, I'll let you think about it for a bit

- YumYum247

ok but the formula is right tho?????right??

- Astrophysics

We don't need a formula, all we have to observe is the frequencies dropping 1 Hz

- Astrophysics

from the original

- Astrophysics

We figured out the frequencies were 322 and 318

- YumYum247

ok so in the initial case the freak was 322Hz and beat freak was 2Hz but then it droped to 1Hz

- Astrophysics

So we have 318 drops to 317 and 322 drops to 321, now if we have beat frequency being 1 Hz, we have the following \[320Hz-317Hz = 1 Hz\] or is it \[321 Hz - 320 Hz = 1 Hz\] which one can we eliminate

- YumYum247

second one would be it.

- Astrophysics

Yes, you're right, so our original frequency then is 322 Hz, notice the question specifies, tuning fork B AND beat frequency dropped 1 Hz. We just had to read it carefully :)

- YumYum247

ooooooooooh i got it.....

- YumYum247

so in the first case we got 322 and 318 and the beat freak was 2Hz but then then the beat freak droped to 1 Hz

- Astrophysics

Yes, as well did the frequency of b

- Astrophysics

they both dropped by 1, it's a nice question

- Astrophysics

It checks if you understand the concept or not :P

- YumYum247

initially we had 320Hz + 2 beat freak = 322
bt then it drooped by 1Hz

- Astrophysics

Yes, that's what we figured out from the previous question, we had two frequencies for b and we had to decipher which one was the original

- YumYum247

so 321 - inital 320 = 1Hz

- Astrophysics

Frequency A was 320Hz, not B

- Astrophysics

We figured out frequency b in your previous problem to be 322, and 318

- YumYum247

yah that's what i meant!!!

- Astrophysics

and it told us in this part that frequency b and the beat frequency both drop by 1 hz

- Astrophysics

ok do you get it now? :)

- YumYum247

79.329% but yah i think i got it.

- Astrophysics

Ok :)

- YumYum247

Thanks an...just one more :")

- Astrophysics

>.<

- Astrophysics

Ok haha

- YumYum247

I'm sorry love but we have to go through this together.....!! :") LOL

- YumYum247

i've done the whole question but i'm just stuck at the line part. can you teach me how to do the calculations at the very end...here is a demo.

- Astrophysics

Other post!

- Astrophysics

:)

- YumYum247

|dw:1436341077195:dw|

- Astrophysics

You need to find the difference

- Astrophysics

That's just of the drill

- YumYum247

no i mean how do i punch the numbers into my calclators????

- Astrophysics

Oooh I see

- Astrophysics

It requires logarithm rules to make it clear we should put brackets \[90 = 10 \log \left( \frac{ I_r }{ I_d } \right)\] we are taking log of base 10, first thing lets get rid of the 10 by dividing by 10 on both sides \[9 = \log \left( \frac{ I_r }{ I_d } \right)\] now we can convert it to exponential form \[10^9 = \frac{ I_r }{ I_d }\]

- YumYum247

ok i understood that you divided both sides by 10...but how did you get from 9 to 10^9?

- YumYum247

can you say like "press log and then something....i'll follow you how you did it.

- Astrophysics

I used the following property \[\huge f(f^{-1}(x)) = 10^{\log_{10}x} = x\]

- Astrophysics

We're just taking the inverse

- YumYum247

inverse of 9

- Astrophysics

No of the logarithm function

- Astrophysics

If you have your calculator on you, notice that there's a "Log" button

- YumYum247

ok

- Astrophysics

if you put 2nd log that will give you the exponential function

- YumYum247

yes i;m holding it

- Astrophysics

That's what we're basically doing, cancelling out the logarithm

- YumYum247

yes there is

- Astrophysics

by taking it's inverse which is the exponential function

- YumYum247

so 2nd log?

- Astrophysics

Yes, but to make intuitive, think of it like this |dw:1436331095538:dw| sort of like this

- Astrophysics

We're doing the same thing with logarithm there

- YumYum247

ok

- Astrophysics

10^9, that's a huge number a billion actually..

- YumYum247

so 9 2nd log?

- Astrophysics

No 2nd log then 9

- Astrophysics

\[\frac{ I_r }{ I_d } = 10^9\]

- YumYum247

no my calculator is different....i'm getting some 1000000000000 as a answer

- YumYum247

so the rocket launcher is 9 or 100000000000times intense????

- YumYum247

compared to drilling???????????

- Astrophysics

a billion times more intense yeah lol

- Astrophysics

1,000,000,000

- YumYum247

mother of garden!!! that's insane!!!

- YumYum247

so each nod on the db scale goes up by 10.

- YumYum247

for exapmple the differernce between 1db and 2 is 20 times the intensity difference???

- Astrophysics

|dw:1436331490707:dw| just a comparison of the scale

- YumYum247

You trully saved my life.........Thank yo infinite.....

- YumYum247

Thank you 8-> much

- YumYum247

oo-> mch

- YumYum247

how did you become so smart???????????????

- Astrophysics

Lol I am not smart, I consider myself pretty dumb! :)

- YumYum247

shush........you should be working in some google company

- Astrophysics

Haha, I wish xD, thank you for the compliment and you're welcome! And a way I gooooo....|dw:1436331812585:dw|

- YumYum247

hey write something about yourself, so people know who you are and where your from????

- YumYum247

Man i gotta say this but whoever created this universe is a effin genius!!!

- Astrophysics

Well, I don't really think all that is important, I just like to help people :)

- Astrophysics

...also I'm a bit lazy!

- YumYum247

LOL well you have something in common!!! :"D

- Astrophysics

hehe

- YumYum247

no i mean i looked at your gif and it just gave me chills to think who could possibly create something massive as a universe.

- Astrophysics

How do you know someone created it :p :D :O

- YumYum247

well nothing really pops up out of nowhere.....

- Astrophysics

Ok :)

- YumYum247

the discipline and the order/manner of everything is what really gets me.

- YumYum247

and that's what Einstein was really fascinated about.....he said nothing really had to be this way.......

- YumYum247

anyways i think i'm starting to eat your brain now....LOL Thank you shooooooo mch!!!! please stay cute as always and i hope i see you again....:")

- YumYum247

soo, Goodnoght!!!!

- Astrophysics

Hey, no it's good, at least you're thinking about this stuff now! Take care :)

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