More compression so yes, less total length.So normally, more extension means more length, but here, more compression means less length?
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More compression so yes, less total length.So normally, more extension means more length, but here, more compression means less length?
overall R increases as now one resistor is in series wid 2 resistors in parallel
yes.OMG THANK U!! ur explanations rock! Seriously I get everything now.. So for the last one q40 we always do charge/mass ratio? For the lowest speed questions I mean?
Charge=Force/Electric field strength
Please anwer this:Charge=Force/Electric field strength
Mass=Force/acceleration
Force will cancel so E/g
Charge is negative as weight acts downwards and as it is in equilibrium an upward force acts to counterbalance it. It will be towards positive charge so drop is negative.
Kinetic Energy= Work Done= Force X distance
just to clear things up11)
The angle that T1 makes with R is greater than the angle that T2 makes with R.
R has to be balanced by the horizontal componts of T1 and T2
Let the angle be θ
R= T1cosθ + T1cosθ and R= T2cosθ + T2cosθ
We can see that for cos,, the greater the angle.. less the value of cosθ
so in order to cancel out R the value of T1 must be greater as cos θ is less in diagram 1. Therefore T1>T2
28)
F= Eq
F = 3 x 10^7 x 1.6 x 10 ^(-19)
F = A
the q is always the charge of the charge that is moving, not the charge of the electric field
39)
It can not be A cause there is suppose to be a deflection not B cause they weight the same not D cause alpha particles are postive and so is the gold necule they repel and not attract so it is JUST C
Then IDKjust to clear things up
the ans to 39 is B not C
you have written C and explained for C to be correct
Markscheme
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_ms_12.pdf
A moving body undergoes uniform acceleration while travelling in a straight line between points
X, Y and Z. The distances XY and YZ are both 40 m. The time to travel from X to Y is 12 s and
from Y to Z is 6.0 s.
What is the acceleration of the body?
A 0.37 m s–2 B 0.49 m s–2 C 0.56 m s–2 D 1.1 m s–2
The closer you get to the nucleus the stronger the push and so Bjust to clear things up
the ans to 39 is B not C
you have written C and explained for C to be correct
Markscheme
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_ms_12.pdf
why not A or CThe closer you get to the nucleus the stronger the push and so B
A has no deflection for the second one and that is wrong as both the gold nucleus and alpha particle carry + change there is suppose to deflectionwhy not A or C
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