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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 230630 times)

Offline omair

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2010 on: May 26, 2010, 03:58:37 pm »
which and why expands more water or ice if heated with same ammount of heat
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2011 on: May 26, 2010, 03:59:42 pm »
Quote from: omair on May 26, 2010, 03:58:37 pm
which and why expands more water or ice if heated with same ammount of heat

Water defo.  Cos inter-molecular bonds of water is slightly weaker than solids, so they are able to expand more (the molecules).
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2012 on: May 26, 2010, 04:01:15 pm »
Quote from: omair on May 26, 2010, 03:58:37 pm
which and why expands more water or ice if heated with same ammount of heat

hmmm .. summer 09 Q 2a) huh :P
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2013 on: May 26, 2010, 04:03:56 pm »
Okay people here is a morale booster :

Statistically, in May/June of the past three years - 21.66666667% of all candidates got an A*. This is an average I worked put from offical data.

Statistically, in Oct/Noc of the past three years - 18.25% of all candidates got an A*.

Thus WE have a better chance of getting an A* than our winter session counterparts.

People lets do this and get it right !!!
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Offline ambitious94

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2014 on: May 26, 2010, 04:04:54 pm »
What's the difference between the use of a vernier calliper and screw gauge. If anyone could please explain how to use them, and WHERE TO USE THEM.....like r they both for thickness and diameters? :S Which one has 0.01mm and 0.1mm readings? :S...a lil confused....a useful link or diagram or explanation wud b life-saving! XD :D
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2015 on: May 26, 2010, 04:05:34 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 04:03:56 pm
Okay people here is a morale booster :

Statistically, in May/June of the past three years - 21.66666667% of all candidates got an A*. This is an average I worked put from offical data.

Statistically, in Oct/Noc of the past three years - 18.25% of all candidates got an A*.

Thus WE have a better chance of getting an A* than our winter session counterparts.

People lets do this and get it right !!!


How does A* at IGCSE work?  Is it by set grade boundaries or is it like first 20% get A*.  So if for instance Bio P3 was super hard, maybe I stand a better chance of getting A* if everyone else found it hard?
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2016 on: May 26, 2010, 04:07:30 pm »
Quote from: Ivo on May 26, 2010, 04:05:34 pm
How does A* at IGCSE work?  Is it by set grade boundaries or is it like first 20% get A*.  So if for instance Bio P3 was super hard, maybe I stand a better chance of getting A* if everyone else found it hard?

The top 10th percetile get A*s

If it was a hard paper then chances are that 10th percentile will be big.
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Offline ambitious94

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2017 on: May 26, 2010, 04:08:18 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 04:03:56 pm
Okay people here is a morale booster :

Statistically, in May/June of the past three years - 21.66666667% of all candidates got an A*. This is an average I worked put from offical data.

Statistically, in Oct/Noc of the past three years - 18.25% of all candidates got an A*.

Thus WE have a better chance of getting an A* than our winter session counterparts.

People lets do this and get it right !!!


LOL...Ari or Ben (whichever one's ur name XD)..i think u shud chillax n so sum phy ryt now than work out averages!! LOL...The way u've been askin questions n answerin them...ur gonna do gr8 pal!
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2018 on: May 26, 2010, 04:09:19 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 04:07:30 pm
The top 10th percetile get A*s

If it was a hard paper then chances are that 10th percentile will be big.

What's 10th percentile, and how does that relate to the 21.666666667% you worked out?  Is the 20% of all candiates get A* or what, and what's percentile.  Sorry for being dumb :(
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Offline WARRIOR

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2019 on: May 26, 2010, 04:11:19 pm »
AAADII..EHM ( i need u to imagine over here )

look if there is a ciruit with a resisor in series and after the resistor comes two PARALEL resistors .

Is it true that if the series resistor has a higher resistance that both the parallel , the current goes thro sreies resitor first?


because the voltge has to be used up in teh series resistor so that we could calculate the voltage around the parallel ones?
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2020 on: May 26, 2010, 04:15:43 pm »
Quote from: Kimo Jesus on May 26, 2010, 04:11:19 pm
AAADII..EHM ( i need u to imagine over here )

look if there is a ciruit with a resisor in series and after the resistor comes two PARALEL resistors .

Is it true that if the series resistor has a higher resistance that both the parallel , the current goes thro sreies resitor first?


because the voltge has to be used up in teh series resistor so that we could calculate the voltage around the parallel ones?
This is absolutely bizarre , please provide a diagram.
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Offline omair

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2021 on: May 26, 2010, 04:17:37 pm »
 Usage of ticker-tape timer to calculate the acceleration of objects.

 CRO displaying a graph, and questions asked about the y-gain, and changing the brightness or the time-base control.

hey any genius find and tell about it
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Offline guMnam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2022 on: May 26, 2010, 04:18:08 pm »
Quote from: A@di on May 26, 2010, 04:15:43 pm
This is absolutely bizarre , please provide a diagram.
i was just sayin tht...
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2023 on: May 26, 2010, 04:18:57 pm »
Quote from: omair on May 26, 2010, 04:17:37 pm
Usage of ticker-tape timer to calculate the acceleration of objects.

 CRO displaying a graph, and questions asked about the y-gain, and changing the brightness or the time-base control.

hey any genius find and tell about it

Ticker-tape =  http://www.physicsphenomena.com/TickerTape.html
    http://www.practicalphysics.org/go/Experiment_310.html

CRO = the time base produces the x-axis. VOltage , the y-axis. when these combine they form a curve. if the voltage is ac , it will form something like the sine curve....say the Y-gain is set at 5V/cm. so in the graph if its 15Volts.. the point will move up 3 cms
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2024 on: May 26, 2010, 04:20:23 pm »
Q: Describe how the energy from the sun becomes stored energy in water behind a dam.[3]

Thx
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