Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Adzel:
--- Quote from: rhea on May 26, 2010, 07:56:58 pm ---umm, but arent split rings there to change direction of I so that coil can take full-turns?
--- End quote ---
Nope those are called slip rings...Dont get mixed up!
thenewkid™:
--- Quote from: 8T on May 26, 2010, 07:56:44 pm ---Are You Sure??
--- End quote ---
yes
objects tht hv internal energy are like a hot water bottle
Ivo:
--- Quote from: diva_sparkles on May 26, 2010, 08:01:28 pm ---yes!
--- End quote ---
Where?
Ghost Of Highbury:
--- Quote from: 6394 on May 26, 2010, 08:01:34 pm ---the energy required for the molecules to evaporate is obtained from the milk
aisa kab hota hai
new to me ;)
--- End quote ---
The milk stays cool, because the water molecules in the damp cloth use the heat energy from the SUN to evaporate.
Ghost Of Highbury:
--- Quote from: NightHawkerr on May 26, 2010, 08:02:28 pm ---oh okay thanks.
One more question.
In past papers, where they ask us to draw resultant forces using parallelogram method, how exactly do we find the mag and direction of resultant force? Like in M/J 2009 Q 4ai)
???
--- End quote ---
draw the parallelogram using the scale. The direction is the diagonal of the parallelogram, and the magnitude is its length(use the scale to convert it into Newtons)
draw the scale diagram as shown
measure the length of the diagonal and calculate the force accordingly
measure the angle
shud be
-> 5500N
--> 30o
attached
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