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-   -   سؤال اختلف عليه مدرسين فيزياء (https://www.thanwya.com/vb/showthread.php?t=268676)

lelekh 06-12-2010 07:20 AM

سؤال اختلف عليه مدرسين فيزياء
 
سؤال مهم في الفيزياء
choose
at constant temperature if the volume is doubled the density will
keep constant_ halved _ doubled(:blush::bosyht9: )

twisterkid317 06-12-2010 11:08 PM

physics
 
I think the answer (keep constant)
please write down the correct one

lelekh 07-12-2010 12:05 AM

هو في واحد قال keep constant
و في مدرس تاني قال halved
بس انت ليه قوللت كده

علي أشرف محروس 07-12-2010 09:16 AM

halved.
please I want answers



In problems concerning Prism to know the refractive index ; some books apply the following
n=sin phi one/sin theta one= sin theta two/sin phi two

but sometimes in the answers they apply this law or use n=sin phi two/sin theta two instead of it

why?
and according to what in the problem ? given that the problem give no information to reach this method


2- Chapter 4

what is the mechanism of the U-shaped tube balance ? when we add oil to the water then the oil pushes the water and we take the separating surface .....is this correct meaning?


twisterkid317 07-12-2010 09:59 PM

I have found out these relations:
the density is directly prop. with the pressure at constant temperature.
the density is inversely prop.to the volume ((v=m\density))
so at constant temperature if the volume is doubled the density decreases to half
...

lelekh 10-12-2010 10:47 PM

please ask your teachers
a teacher said keep constant because the density is phisical property

nashat gamal 12-12-2010 05:22 PM

keep constant because the density is phisical property
that is correct but not with gases

lelekh 18-12-2010 09:11 PM

why not in gases please explain your answer

mohamed bido 20-12-2010 11:05 PM

keep constant
bec. v depends on temp. only

Mrfarag 06-01-2011 07:25 PM

الإجابة الصحيحة
 
تقل الكثافة للنصف
The density will lowerd to half
where Density=mass/volume
and the mass is constant so the density will halved

mohab youssef 18-01-2011 10:50 PM

i think since from boyle's law at constant temp volume is inversly proportional with pressure so as volume is doubled pressure is halved and as pressure is directly proportional with density so pressure is halved

heaven angel 23-01-2011 07:37 PM

the denisty is costant

ahmed901 05-03-2011 02:54 PM

If it is a gas,density decreases to its half
and if it is a solid or a liquid substance,density remains constant

عزه ابوسيف 20-04-2011 01:05 PM

HI
I AM Dr.AZZA
ANSWER IS HALVED
BECAUSE OF
DENISTY= WIGHT /VOLUME

ا/محمودعبدالباسط 22-04-2011 05:14 PM

هوده سؤال تختلفوا عليه ده تافهههههههههههههههههههههه


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