Qualification > Sciences
Edexcel PHYSICS Doubts
The Golden Girl =D:
I really hope you answer me :-\ :-X
Same paper :
Q.8 and Q.9... as well as Q]12)b) [ I never seem to understand these graphs ] .. Q.14 [ didn't get the MS at all :$ ] ..Q.17]c)iv)
I guess that's all :-[ :-[ :-\
astarmathsandphysics:
8.C since the rest mass of a positron is 9.1*10^-31 kg
9.1.8*10^-29 kg
1Mev/c^2=1*10^6*1.6*10^-19/(3*10^8)^2 =1.8*10^-30 kg
(1.8*10^-29)/1.8*10^-30=10 A
10 C since E=mc^2
The Golden Girl =D:
but Sir , 8 is B according to the MS :$
and 9 the answer of nine isn't within the option of A to D :S
astarmathsandphysics:
12. take logs
ln (R)=ln(R_0) - ut
-u is gradient = (3.26-4.28)/(24-8)=-1.02/16=-0.06375/cm
14. Between the plates the field E is constant so the force on the charged ball is F=Eq and acceleration is a=F/m=Eq/m also constant (so v is a straight line). When the ball its a plate is is charged with opposite sign so is repelled from plates but as before, acceleration constant.
astarmathsandphysics:
Of course 8 is B I thought is said travelling at relativistic speed.
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