Biology; Chemistry; Physics: Post your doubts here!

[convent2012]

use the formula
"degree celcius = [l(theeta) - l(ice point) / l(boiling point) - l(ice point)] * 100 "
40 = [ l(theeta) - 2 / 22 - 2] * 100
l(theeta) = 6cm , OPTION A

its answer is D
http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s08_ms_1.pdf

 

[luckywang]

question
Q) how does size of the bulb affect the range of the thermometer ?

range? i only know the smaller the bulb the more sensitive thermometer is...

 

[convent2012]

its answer is D
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s08_ms_1.pdf

i got it

 

[luckywang]

phy june08 paper1 15??

answer is D? 22-2/100 then x40... answer is 8cm then add then 2cm =10cm?

 

[Fallen316]

its answer is D
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s08_ms_1.pdf

oh right, calculation mistake , you have to do it the same way

 

[Fallen316]

range? i only know the smaller the bulb the more sensitive thermometer is...

it has something do do with range, im sure .

 

[luckywang]

what is p.d.s in the C.R.O. chapter?

 

[luckywang]

it has something do do with range, im sure .

the size bigger, more mercury, the longer the range?

 

[Fallen316]

the size bigger, more mercury, the longer the range?

I asked you the question

 

[Dukeofwin]

its answer is D
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s08_ms_1.pdf

The formula is (Theeta) - (Zero celsius)/(100 Celcius) -(Zero celsius) x100=Temperature required!

Accroding to which x-2/22-2 x100=40
40x20/100=8
x-2=8
x=10

The solution is confusing, but this is how it has to be solved!

 

[convent2012]

The formula is (Theeta) - (Zero celsius)/(100 Celcius) -(Zero celsius) x100=Temperature required!

Accroding to which x-2/22-2 x100=40
40x20/100=8
x-2=8
x=10

The solution is confusing, but this is how it has to be solved!

thanks i got it

 

[Dukeofwin]

question
Q) how does size of the bulb affect the range of the thermometer ?

The smaller the bulb the more sensitive it is, thus the range is more accurate!
The bigger the bulb the less sensitive and the least accurate it is!

No effect on the range, just the accuracy

 

[convent2012]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s09_qp_1.pdf
why in 5th mcq resultant force is zero ??

 

[luckywang]

The smaller the bulb the more sensitive it is, thus the range is more accurate!
The bigger the bulb the less sensitive and the least accurate it is!

No effect on the range, just the accuracy

the size bigger, more mercury, the longer the range?

so my theory rejected?

 

[luckywang]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s09_qp_1.pdf
why in 5th mcq resultant force is zero ??

yup!

 

[Fallen316]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s09_qp_1.pdf
why in 5th mcq resultant force is zero ??

since the mass is not moving, its acceleration is zero.
apply F = ma
F = 20*0 = 0N

 

[Dukeofwin]

so my theory rejected?

Maybe, because the sensitivity has no connection with the range!

 

[convent2012]

since the mass is not moving, its acceleration is zero.
apply F = ma
F = 20*0 = 0N

thanks

 

[bogus]

i am sure it is C! spaces between feathers do act as insulator, but for heat, and that is not related to electricity!

c is the correct answer u r right

 

[Fallen316]

what's the effect of pressure on boiling point ?