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Physics, Chemistry and Biology: Post your doubts here!

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100 C = 22 cm
0 C = 2 cm
so the range is 20 cm (20-2)
100 C/20 cm = 5 C for each cm
In the picture the thermometer is at 8 cm. But remember 2 cm is 0 degrees, so 8-2 = 6 cm
and finally 6 x 5 = 30 degrees C
So the answer is C
Hope you understood.


THANKS SO MUCH!! :D I UNDERSTOOD
 
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in Q3 u will hv to fnd de speed at all 4 stages...dere will b 2 wid de same speed...hope u gt it..:)
in Q29..we knw dat PD is directly propotional to resistance nd dat resistance is inversly prpotional to current....dere fre choose de with low pd but de 1 wid more current...r u cn easily fnd it by calculation using de formula...hope u gt it


Thanks a lott :)
 
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Another question


You have to read the question carefully, it says 'When placed in steam, the mercury level rises to 22cm' therefore, 22cm is 100 degree. And when placed in melting ice it falls to 2cm. So 2cm is 0 degree.
Each point starting from 4cm is denoted as 10 degree.
So 2 = 0 degree
4 = 10 degree
6 = 20 degree
and 8 = 30 degree. (.. till 22 cm = 100 degree)
So the answer is 'C' (30 degree).
Hope you got me :) Good luck xx
 
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Oh yeah, that's the answer I got. I was just confused because I was looking at different variants, by bad. :oops:

Thanks a lot for answering though, I really appreciate it. :)
 
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