Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
8Z:
--- Quote from: Ari Ben Canaan on April 01, 2010, 11:07:59 am ---When calculating the gradient of a line in PAPER 6 a mark is given for drawing a triangle 'more than half the length of the line'.
The examiners report also refers to the TRIANGLE METHOD alot. What is this method/how does it work.
The only way I know to calc. a gradient is using (y2-y1)/(x2-x1).
--- End quote ---
you get your straight line by plotting the points
then draw a triangle such that the line is the hypotenuse of a right angled triangle (if that makes sense?)
the triangle should be big so i recommend that you use the first and last point
basically it's rise over run which gives you the same answer ans (y2-y1)/(x2-x1)
Hope this helps :)
h
holtadit:
Here....
Vin:
--- Quote from: Ari Ben Canaan on May 26, 2010, 12:35:48 pm ---Can you explain how PE and KE of water molecules change when evaporation occurs ?
--- End quote ---
Latent heat of Vaporization
If the molecules are to overcome the forces holidaying them together and gain "freedom" they need a large amount of energy. They receive this latent heat while heating which increases the PE of the molecules and NOT KE this causes only the temp rise. same for fusion
8T:
--- Quote from: 8Z on May 26, 2010, 12:50:53 pm ---
you get your straight line by plotting the points
then draw a triangle such that the line is the hypotenuse of a right angled triangle (if that makes sense?)
the triangle should be big so i recommend that you use the first and last point
basically it's rise over run which gives you the same answer ans (y2-y1)/(x2-x1)
Hope this helps :)
h
--- End quote ---
Check ur inbox Hun (:
Vin:
--- Quote from: lmfao on May 26, 2010, 12:48:32 pm ---kkl but what are the values
--- End quote ---
YOU gotta measure them .. i dont have them on hard copy and its impossible to measure them on pc ;) refer the ms
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