Need physics help.

2009-03-05 20:22:14

#1

Whiplash: Future Aviator; +40|5796|Central Texas

FM radio bands range from 88 MHZ through
108 MHz.
The speed of light is 3 × 10⁸ m/s.
What is the wavelength for the FM radio
band at 98 MHz? Answer in units of m.

I used the formula wavelength = velocity/frequency and came up with 3061224.4897, but it says my answer is wrong. What am I doing wrong?

Last edited by Whiplash (2009-03-05 20:32:59)

2009-03-05 20:24:01

#2

Superior Mind: (not macbeth); +1,755|6708

liquidator. PM him.

x

2009-03-05 20:25:06

#3

Whiplash: Future Aviator; +40|5796|Central Texas

He's not online and I need help right now unfortunately.

2009-03-05 20:28:56

#4

Superior Mind: (not macbeth); +1,755|6708

Whiplash wrote:
He's not online and I need help right now unfortunately.

Ok, I'll look at my notes. One sec.

x

2009-03-05 20:29:23

#5

bugz: Fission Mailed; +3,311|6327

Don't you mean the speed of sound? not light

Steam: http://steamcommunity.com/id/ebug122

2009-03-05 20:29:34

#6

Flaming_Maniac: prince of insufficient light; +2,490|6722|67.222.138.85

Unit analysis ftw.

What are the units for velocity? Frequency? How do you manipulate those to get to distance?

ebug9 wrote:
Don't you mean the speed of sound? not light

radio waves = light

the speed of light is 3x10⁸ by the way, not 3x108. I don't know if that was laziness on your part for bbcode or if you're using a value that is radically off.

2009-03-05 20:31:43

#7

Whiplash: Future Aviator; +40|5796|Central Texas

I'm so confused, I haven't had anything lower than an A in this class until now.

@Flaming: Yea, It didn't copy right from the website. My bad.

Last edited by Whiplash (2009-03-05 20:32:36)

2009-03-05 20:33:42

#8

Flaming_Maniac: prince of insufficient light; +2,490|6722|67.222.138.85

MHz = 1x10⁶Hz yes?

2009-03-05 20:35:39

#9

Reddhedd: trolawlawl; +188|6460|EE Chat

Flaming_Maniac wrote:
MHz = 1x10⁶Hz yes?

Yes.

Last edited by Reddhedd (2009-03-05 20:43:14)

2009-03-05 20:37:06

#10

Whiplash: Future Aviator; +40|5796|Central Texas

Well I come up with 3x10^14. That's wrong though, so I don't know anymore.

2009-03-05 20:37:16

#11

Superior Mind: (not macbeth); +1,755|6708

Idk. We've only just begun this in Astronomy and I haven't taken another physics class in four years. Sorry.

Last edited by Superior Mind (2009-03-05 20:37:48)

x

2009-03-05 20:39:02

#12

Reddhedd: trolawlawl; +188|6460|EE Chat

Whiplash wrote:
Well I come up with 3x10^14. That's wrong though, so I don't know anymore.

Do you know the answer? If so, please tell, I could solve it backwards.

2009-03-05 20:39:42

#13

Whiplash: Future Aviator; +40|5796|Central Texas

Reddhedd wrote:
Whiplash wrote:
Well I come up with 3x10^14. That's wrong though, so I don't know anymore.
Do you know the answer? If so, please tell, I could solve it backwards.

No, I don't know the answer.

2009-03-05 20:39:44

#14

Flaming_Maniac: prince of insufficient light; +2,490|6722|67.222.138.85

3e8/98e6
3.06122449

So sayeth the TI-83. So sayeth we all.

(m/s)/(1/s) = ms/s = m

2009-03-05 20:40:26

#15

Reddhedd: trolawlawl; +188|6460|EE Chat

Flaming_Maniac wrote:
3e8/98e6
3.06122449

So sayeth the TI-83. So sayeth we all.

Graphing calc FTW. mine's in the other room, too lazy to move.

2009-03-05 20:40:51

#16

Whiplash: Future Aviator; +40|5796|Central Texas

Flaming_Maniac wrote:
3e8/98e6
3.06122449

So sayeth the TI-83. So sayeth we all.

That's right. My TI-83 died on me, so I'm stuck with this stupid computer calculator. Where did you get the 98e6 from?

2009-03-05 20:41:10

#17

Mutantbear: Semi Constructive Criticism; +1,431|5980|London, England

Get your friends to give you the answer

_______________________________________________________________________________________________

2009-03-05 20:41:37

#18

Flaming_Maniac: prince of insufficient light; +2,490|6722|67.222.138.85

Whiplash wrote:
Flaming_Maniac wrote:
3e8/98e6
3.06122449

So sayeth the TI-83. So sayeth we all.
That's right. My TI-83 died on me, so I'm stuck with this stupid computer calculator. Where did you get the 98e6 from?

Flaming_Maniac wrote:
MHz = 1x10⁶Hz yes?

Always have to use SI units. You needed to convert MHz -> Hz before doing anything.

2009-03-05 20:42:45

#19

Whiplash: Future Aviator; +40|5796|Central Texas

Flaming_Maniac wrote:
Whiplash wrote:
Flaming_Maniac wrote:
3e8/98e6
3.06122449

So sayeth the TI-83. So sayeth we all.
That's right. My TI-83 died on me, so I'm stuck with this stupid computer calculator. Where did you get the 98e6 from?
Flaming_Maniac wrote:
MHz = 1x10⁶Hz yes?
Always have to use SI units. You needed to convert MHz -> Hz before doing anything.

Ahh ok, well my teacher just gave us this without explaining anything. Thanks.

2009-03-05 21:05:32

#20

Jestar: Shifty's Home Number: 02 9662 8432; +373|6756

You'll get fucked up next year in Physics in you can't use correct units.

2009-03-05 21:09:03

#21

Whiplash: Future Aviator; +40|5796|Central Texas

Yea, well I have a dumb teacher that doesn't teach shit. I got a 95% on my homework by the way. Thanks.

BF2S Forums Need physics help.

Whiplash wrote:

ebug9 wrote:

Flaming_Maniac wrote:

Whiplash wrote:

Reddhedd wrote:

Whiplash wrote:

Flaming_Maniac wrote:

Flaming_Maniac wrote:

Whiplash wrote:

Flaming_Maniac wrote:

Flaming_Maniac wrote:

Flaming_Maniac wrote:

Whiplash wrote:

Flaming_Maniac wrote:

Flaming_Maniac wrote:

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