2 hard physics quistions

nada_elsayed · #1 03-12-2011, 05:43 PM

السلام عليكم...

عندى سؤالين صعبين حد ممكن يساعدنى ف حلهم

a body has aweight of 160 N when weighted in air and a weight of 120 N when totally immersed in a liquid
Find relative density of the body?

Water pipe inters a house at ground floor ,if its radius 5cm velocity of water is 1m/sec ,at upper floor its radius becomes 1cm
What is the force acted by water?]

nada_elsayed · #2 03-12-2011, 05:50 PM

يلا حد يحاول يحل لانى بجد مش عارفه طريقه الحل
بس عارفه الحل النهائى

ousha_86 · #3 05-12-2011, 01:38 PM

tb heya awel wa7da el-relative density bta3et-ha hatkun ... (( 4times The Relative Density of the Liquid )) ??!sa7

nada_elsayed · #4 06-12-2011, 11:23 AM

هو اول واحده مكتوب الحل 3.2
بس المستر قالى غلط وانها 4
فأعتقد ان الاجابه اللى ف الكتاب غلط
i think u r right it's 4times the relative density of the liquid
what adout the second one??

ahmed01234 · #5 11-12-2011, 11:58 AM

a el 3laka ben l force w msa2el el visocosity!!!
2t2kdy mn el so2al

nada_elsayed · #6 14-12-2011, 01:26 PM

no it is a right one
i knew the answer

ahmed01234 · #7 15-12-2011, 11:18 AM

Ya ret tktby el answer

nada_elsayed · #8 18-12-2011, 11:53 AM

196.3 n
thats the ans

dr:esraa · #9 19-12-2011, 11:39 AM

اقتباس:

المشاركة الأصلية كتبت بواسطة nada_elsayed

a body has aweight of 160 N when weighted in air and a weight of 120 N when totally immersed in a liquid
Find relative density of the body?

hwa msh el mafroud enna hangeb el upthraust force w hatb2a 40 n w ba3dha l mafroud ykon ma3ana el denisty bta3t el liqued 3ashan ngeb el volume immersed w lma ngeb l volume immersed n2dr ngeb el denisty bta3t el solid w n2smha 3la 1000 w ngeb el R.D bta3t el body ????????? a3tkd en el so2al na2so el denisty bta3t el liqued fe 7alet lw 3awez l rR.D rakm mo7add !!!!!!!!!!!
lakn p2a lw 3awez lratio between l R.D W l denisty bta3t el liqued >>>>>>>>>>>>
fa ana tl3t m3aya l R.d = 0.04 DENISTY OF LIQUED

W t2rebn ana mut2kda mn egabty fa yaret tktby el full answer

ahmed01234 · #10 25-12-2011, 05:36 PM

اقتباس:

المشاركة الأصلية كتبت بواسطة nada_elsayed

196.3 n
thats the ans

steps??????????????

nada_elsayed · #11 01-01-2012, 11:07 AM

حتبقى عن طريقchange in momentum

ahmed01234 · #12 03-01-2012, 02:53 AM

اقتباس:

المشاركة الأصلية كتبت بواسطة nada_elsayed

حتبقى عن طريقchange in momentum

F=PL/T
hngeb mnen el change in time w mnen el change in momentum?