Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Adzel:
--- Quote from: Shazizzzle on May 26, 2010, 04:57:08 pm ---So... What're you guys doing for Paper 3?
We obviously cannot complete the entire syllabus in one day.
--- End quote ---
Im actually going through my previously solved pastpapers (2009 - 2002) + Reading my text book, how about you?
MasterMath:
Anyone can help me with Vernier calipers? ive never done it and never even heard about it in school ??? So anyone can tell me how to use it or anything ?
Thanks!
holtadit:
--- Quote from: Shazizzzle on May 26, 2010, 04:57:08 pm ---So... What're you guys doing for Paper 3?
We obviously cannot complete the entire syllabus in one day.
--- End quote ---
REVISION, REVISION and lets see MORE REVISION !! :P
Malak:
--- Quote from: ang3l on May 26, 2010, 04:48:29 pm ---Q: draw wavefronts to show what happens after the waves strike the surface
Anyone? thx :D
--- End quote ---
help??
Shazizzzle:
--- Quote from: Raywin on May 26, 2010, 04:58:33 pm ---Wait. I thot the Q said that AFT 16.3g of ice is melted the heater is turned off.. so why r we subtracting 2.1 from 16.3?? Thts wht i dont get!! Thx a lot! :)
--- End quote ---
Yeah, well, the heater gave it the activation energy to BEGIN melting!
When the heater stopped, the melting that took place for the next two minutes, was by the heat energy provided by the surroundings.
That heat energy from the surroundings was also provided WITH the heater, so the 16.3 g was a combination of melting due to heater, AND melting due to heat from surroundings.
Therefore, to calculate the mass melted by THE HEATER ITSELF, we subtracting the reading WITHOUT HEATER, from the reading for both. :)
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