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

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: halosh92 on February 12, 2010, 11:24:01 am

Title: PHYSICS AS HELP
Post by: halosh92 on February 12, 2010, 11:24:01 am: 2009 JUN physics cie
paper 1
Q9
Q11
Q13
Q20
Q21
q29

thxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ;D
Title: Re: PHYSICS AS HELP
Post by: astarmathsandphysics on February 12, 2010, 12:12:03 pm: Q9
Q11
Q13
Q20
Q21
q29
q9 change in momentum =m(v-u)=0.1(20--30)=5 B
11)A the deeper you go, the greater the pressure
13)c 0.2*900=0.6*F
20)Y=Fl/Ae so F=YAe/l double the length means half the force and half the area means half the force
Acos 1/2*1/2=1/4
21)1/2*.3*12=1.8 A
29)d conservation of energy 1/2mv^2=qV=qEx
Title: Re: PHYSICS AS HELP
Post by: Saladin on February 12, 2010, 01:29:39 pm: mr paul

u r getting fast these days

i never much of a chance to answer a physics or math question b4 u do.
Title: Re: PHYSICS AS HELP
Post by: astarmathsandphysics on February 12, 2010, 02:02:29 pm: I try . And my pc doesnt work cos I misupgraded the os
Title: Re: PHYSICS AS HELP
Post by: saifalan on February 12, 2010, 03:42:22 pm: And I thought astar was one of those computer geeks :-\
Title: Re: PHYSICS AS HELP
Post by: astarmathsandphysics on February 12, 2010, 03:51:29 pm: Nope. Just am amateur
Title: Re: PHYSICS AS HELP
Post by: halosh92 on February 12, 2010, 05:03:56 pm: Quote from: astarmathsandphysics on February 12, 2010, 12:12:03 pm
Q9
Q11
Q13
Q20
Q21
q29
q9 change in momentum =m(v-u)=0.1(20--30)=5 B
11)A the deeper you go, the greater the pressure
13)c 0.2*900=0.6*F
20)Y=Fl/Ae so F=YAe/l double the length means half the force and half the area means half the force
Acos 1/2*1/2=1/4
21)1/2*.3*12=1.8 A
29)d conservation of energy 1/2mv^2=qV=qEx

thx alott!!!!!!!!!!!!!!! gr8 and fathomable :D!!!!!!!
Title: Re: PHYSICS AS HELP
Post by: halosh92 on February 13, 2010, 05:25:48 am: Quote from: astarmathsandphysics on February 12, 2010, 12:12:03 pm
Q9
Q11
Q13
Q20
Q21
q29
q9 change in momentum =m(v-u)=0.1(20--30)=5 B
11)A the deeper you go, the greater the pressure
13)c 0.2*900=0.6*F
20)Y=Fl/Ae so F=YAe/l double the length means half the force and half the area means half the force
Acos 1/2*1/2=1/4
21)1/2*.3*12=1.8 A

could you please explain furthur on question 13 and 21
29)d conservation of energy 1/2mv^2=qV=qEx
Title: Re: PHYSICS AS HELP
Post by: SGVaibhav on February 13, 2010, 06:51:31 am: Quote from: saifalan on February 12, 2010, 03:42:22 pm
And I thought astar was one of those computer geeks :-\
Quote from: astarmathsandphysics on February 12, 2010, 03:51:29 pm
Nope. Just am amateur

Aha amateur geek ;D
Title: Re: PHYSICS AS HELP
Post by: nox_fjmoony on February 18, 2010, 06:06:14 pm: Quote from: astarmathsandphysics on February 12, 2010, 02:02:29 pm
I try . And my pc doesnt work cos I misupgraded the os

how so?
Title: Re: PHYSICS AS HELP
Post by: astarmathsandphysics on February 19, 2010, 12:15:40 am: Is half working now