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Question 3, 4 , 5 , 8 , 11 , 14 , 15 , 19 , 24 , 33 , 35 , 37 , 38 PLEASEEEE!http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w13_qp_12.pdfDo some of them at least or by tonight.. :/ i know you have to prepare.
Q3:- as Cd has no units the we won't mention it in our sol.
so ρ (V^n) A = F
V^n = F/ρA
now we will just put the base units of them...
(m/s)^n = (kgm/s^2) / (kg/m^3 x m^2)
(m/s)^n = ( m^2 / s^2 )
(m/s)^n = (m/s)^2
so n=2
Q4:-
Q5:- for ths question m gettng B :/ but still i'll try it once again n then tell u
Q8:-
Q11:- here the first we have to do is to change the cm^2 of A into m^2
so for that we will divide 1 by 10000 = 1 x 10^-4
then we will put all the values in the formula:- P= F/A
over here as we r given with the amount of a-particles colliding per second then by multiplying ths value with speed will give us the acceleration...
so P= ((6.6 x 10^-27) x (1.5 x 10^7) x (5.0 × 10^4)) / (1x10^-4)
= 4.95 x 10^ -11
Q14:- in ths question we will simply find the resultant force of both at X n Y and the subtract them frm eachother
the resultant force in X is :- 2(Tcosθ) = 2 ( 100 cos65) = 84.6
the resultant foce in Y:- 2(Tcosθ) = 2( 120 cos55) = 137.6
so the increase will be :- 137.6 - 84.6 = 53
Q15:-
Q19:- we r given with volume and density n we have to find the mass first..
so m=1000 x 340 = 340000 kg
time= 60 s ( 1 minute)
g= 9.81
h= 30m
put ths in the equation :- P= (mgh) /t to get the input power
our input power = 1667700 W
as efficiency= (output power / input power) x 100
then output power= 1500930 W = 1.5 MW
Q24:- F = ke
so e= F/k
e= 25/150
e=0.167
so original length= 0.55 - 0.167 = 0.383 m
Q33:- P=I^2R ( m using ths formula cuz current will be the same acroos both resistors as they r in series where as V will be dffrnt)
so P in internal resistor = I^2 R
in external resistor = (I^2) 2R
so their ration will be 2
Q35:-
Q37:- In ths question we have to check for the resistance... we know that when resistance is less then voltage will be also less
so there will be lesser voltage in resistor 2 Ω and will be greater in resistor 4 Ω
n as the voltage from X to Y is frm positive to negative so it will be decreasing passing each resistor
Q38:- ok so first we will find the total V across resistors R, 2R, 3R
V in R= 2 V
total resistance= 6R
so
Vr = (2/6) V (Vr is the V across resistor 2R)
so V=6
as the V remains the same in parallel circuits so V across 4R will be also 6V
n emf = 6V