ALL PHYSICS DOUBTS - POST HERE !!

[Fastal]

the pin is very lightweight compared to the metal cylinder...its extremely thin. the optic pin or thinner than that..

check the image. with the weight of the metal cylinder, it wud be easy to just slip it out with no movements from the cylinder.

how would you place the cylinder exactly on the pin?

[Ghost Of Highbury]

mark the center of the cylinder. keep the center on the pin.

If you avoid parallax error, it will be placed exactly on the pin (@10.0 cm mark)

[Fastal]

what about this idea?

find radius
and make sure where the markings end, its 10 cm +the radius

[Ghost Of Highbury]

what about this idea?

it involves the same idea of using the pin. in both ways u have to find the center (or the radius).

any wud do..

[Fastal]

it involves the same idea of using the pin. in both ways u have to find the center (or the radius).

any wud do..

well it avoids the taking the pin out part, which may cause the cylinder to move a little

[Ghost Of Highbury]

If u take it out carefully, theres no chance of movement. whatever.

[Baladya]

which is better in insulation: A piece of cloth soaked in water and wrapped around a beaker of hot water, or a piece of cloth dry (has air in it) and wrapped around a beaker of hot water?? Which is better and why in terms of molecules, kinetic energy, bla bla...
Thanks

[Vin]

A piece cloth soaked in water does totally opposite of insulation .. water molecules evaporate and take away the heat energy with them (the heat is used up to convert water to vapor as the kinetic energy of of molecules is enough to break the water bond) . this is good wen a body is to be kept cold ..  

As dry cloth has air .. body stays warm as air is a bad conductor of heat ..

[Naruto123]

hey guyz lsn
What are the important instruments for physics ppr 6
because recently deyr have been VErnier scale and micrometer screw gauge poppin up
so all unhheard instruments can  u  guyz name ?
thx

[holtadit]

hey guyz lsn
What are the important instruments for physics ppr 6
because recently deyr have been VErnier scale and micrometer screw gauge poppin up
so all unhheard instruments can  u  guyz name ?
thx

Go to youtube and search for micrometer and vernier callipers. There will be several videos showing you how to use each.

[Naruto123]

lol i knw how yo use dem bt i wanna know if deyr r any oder such instruments i need to knw abt
thx

[Vin]

lol i knw how yo use dem bt i wanna know if deyr r any oder such instruments i need to knw abt
thx

I dont think so .. stick to them for now ..

[Naruto123]

thxxxx bt if any1 knows plz help so dat God helps u
okieee 

[Baladya]

A piece cloth soaked in water does totally opposite of insulation .. water molecules evaporate and take away the heat energy with them (the heat is used up to convert water to vapor as the kinetic energy of of molecules is enough to break the water bond) . this is good wen a body is to be kept cold ..  

As dry cloth has air .. body stays warm as air is a bad conductor of heat ..

And the molecules with the less energy are the ones left over which makes it cold.... bla bla. Ya man i understood that Just got mixed up
Thanks
And plz stop answering people so fast, give us a chance too xD   jk ehehhhehe

[Naruto123]

i knw this has been answered and i still dunt get it plz can any 1 explain ?
http://www.freeexampapers.us/IGCSE/Physics/CIE/2005%20Nov/0625_w05_qp_6.pdf
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