Physics p1 questions! help

[hafza89]

guys please help me out
P1 physics november 2008 q 27, 32

q 27) a small microwave receiver is moved from T towards S. receives signals of alternate maxima and mininma intentsity. the distance between one maximum and the nest is 15 mm. what is the frequencey of the microwaves

A 1.0 x 10^7
B 2.0 x 10^7
C 1.0 x 10^10
D 2.o x 10^10

[hafza89]

32 An electric power cable consists of six copper wires c surrounding a steel core s.

1.0 km of one of the copper wires has a resistance of 10 ? and 1.0 km of the steel core has a
resistance of 100 ?.
What is the approximate resistance of a 1.0 km length of the power cable?
A 0.61 ? B 1.6 ? C 160 ? D 610 ?

[khuram234]

Nice questions

[melodie_]

well i really don't think this question has anything to do with let's say diffraction, it's just about what the actual wavelength of a microwave is.. so, it's c

[AbuxaR]

I think its either
A, B, c or D

!!!!! oh how genious i am !!!!!

[khuram234]

AbuXar i was also thinking that it will be A,b,C or D oh man i m also a genious. 2 geniouses at one place oh my ghosh!!!!!!!

[siddiss]

  are u guys smoking sumfing...lol

[hafza89]

lol..  exam's in less than 24 hours and this is the kind of help i get lol !! if any of u come up wit the answers do lemme kno!

[catfish]

C and B

[astarmathsandphysics]

Right catfish frequency=c/wavelength=3X10^8/0.03
1/r=(1/10)*6+1/100

[mafia]

help plzz ppl i need ur help phy p1 omg plzzzzzzzzzzzzzzzzzzzzz help me out

[hafza89]

thanks A star ...but y did u use 0.03 as wavelength

[x2decent]

can i gt may june 2009 phy. p1 mark scheme plzz ....do u hav it ?

[ihatecheaters]

No

[khuram234]

i will tell u the mark scheme of may/june 09 ppr k now happy but 2morow
nd hafsa did u understand that or do u want me to help out.