plz answer this question

[dr:esraa]

هى المسأله سهله جدا بس انا بأخد مع 2 مدرسين كل واحد مطلع اجابه مختلفه ,,,,,,
u-shape tube of area 2 cm square has an amount of water ... if 9 cm of kerosen has been poured in one side so height diff. of water im the two sides is 3.6 cm ..... find denisty of kerosen and volume of benzen poured in other side to make level of water becomes the same in the two sides (denisty of water is 1000 and denisty of nbenzen is 900 ) >>>>>> مستر مطلع كثافة الكيروسين 800 و التانى مطلعها 400 ؟؟؟؟؟ايه اللى صح ؟؟؟؟؟؟؟؟ يا ريت حد يرد

[mr abn]

بسم الله الرحمن الرحيم

هناك سوء تفاهم بسيط في المسألة


المدرس الاول اللي حل الكثافة = 800

كان نص المسألة
(صب 9 سم3 اي المعطي هو حجم سائل الكيروسين)


اما المدرس الثاني اللي حل الكثافة = 400

كان نص المسألة
(صب 9 سم كيروسين اي المعطي هو ارتفاع السائل )

اتمني ان اكون وضحت الفكرة

وشكر

[dr:esraa]

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ربنا يكرمك يا مستر

[alasfor]

شكرااااااااااااااااااااااااااااااااااا

[wail_poet]

the problem is found in student evALUATION page 59 in problem department #28 and the problem as following:

28- U-shaped tube of cross section area 2cm2 has amount of water, 9cm3 of kerosene has been poured in one side, so the height difference of water in the two sides is 3.6cm. find the volume of benzene poured in the other side till the level of water becomes the same in the two sides (pw=1000 kg.m3,pbenzene=900kg/m3) the answer is [8 cm3]
======================
the steps:

(ph)water=(ph)kerosene so
1000 x 3.6 = pK x 4.5 so pK = 800 kg/m3.
(ph)Benzene=(ph)kerosene so
900 x h = 800 x 4.5 so h benzene = 4 cm so its volume = 4x2=8cm3.
with my regards Mr. WAlid 01004104024