Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
$!$RatJumper$!$:
--- Quote from: Dania on November 11, 2010, 08:25:25 pm ---No, they can be used for either vertical or horizontal.
The only difference is that acceleration would be taken as -9.81 ms-2 if the object is going up. If it moving horizontally, the acceleration can be calculated using v2=u2 + 2as or any other motion equation regarding acceleration.
You should remember that speed is a scalar, and velocity is vector. In many questions, they will state whether it is speed or velocity. If they say it is speed, you should use the equation Speed=Distance/Time to find what it is you're looking for.
I hope I was helpful :)
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Thank you! Best of luck for today :)
Deadly_king:
--- Quote from: $!$RatJumper$!$ on November 12, 2010, 04:39:06 am ---Thank you! Best of luck for today :)
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Good luck to you too buddy ;)
Hope we are blessed with an easy paper ;D
$!$RatJumper$!$:
haha thanx man :)
Good luck to everyone here too! You all have been amazing in helping out. I've learnt so much here and cleared so many doubts :)
ashish:
--- Quote from: Dania on November 11, 2010, 05:20:35 pm ---Refer to the attachment.
Please explain.
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TO the Examiner sir a voltmeter with infinite resistance doesn't exist XD
it's pretty easy
3.6V is for the 2000ohm resistance
V= IR
3.6/2000=I
I=1.8*10-3A
let resistance of the thermistor be T
R=((1/5000)+(1/T))-1
R=5000T/T+5000
V=IR
2.4=1.8*10-3 5000T/T+5000
when solving for T
you will get 1818.2 ohm
Deadly_king:
--- Quote from: ashish on November 12, 2010, 08:57:04 am ---TO the Examiner sir a voltmeter with infinite resistance doesn't exist XD
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To ashish..........it sure does not exist in practice, but it does on theory. ;D
But each time you make use of a voltmeter in a circuit, you should assume it has infinite resistance so that it draws no current. ;)
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