IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: MaNi_DaDuDe on April 22, 2010, 01:25:41 pm

Title: Help! Quick physics question
Post by: MaNi_DaDuDe on April 22, 2010, 01:25:41 pm

http://www.srepapmaxeeeerf.org/A%20Level/Physics/CIE/2006%20Nov/9702_w06_qp_6.pdf

Q15b? Why is it 9kHz?

Also, Q15c?

Title: Re: Help! Quick physics question
Post by: falafail on April 24, 2010, 11:15:41 am

Quote from: MaNi_DaDuDe on April 22, 2010, 01:25:41 pm

http://www.srepapmaxeeeerf.org/A%20Level/Physics/CIE/2006%20Nov/9702_w06_qp_6.pdf

WTF IS THAT?!?!?!!  :o

waitt... paper 6? why are you doing paper 6? :/

Title: Re: Help! Quick physics question
Post by: astarmathsandphysics on April 24, 2010, 03:06:00 pm

When I get home

Title: Re: Help! Quick physics question
Post by: astarmathsandphysics on April 24, 2010, 11:05:15 pm

2*4500=9kHz
3*10^8/10^3-3*10^8/10^4=270KHZ
270KHz/9KHZ=30

Title: Re: Help! Quick physics question
Post by: astarmathsandphysics on April 24, 2010, 11:15:58 pm

See also this

http://www.electronics-radio.com/articles/radio/modulation/amplitude_modulation/am.php