2011- 10- 7
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#8
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أكـاديـمـي
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رد: ممكن واجب الفيزيا ...:(
بنات عرفت كيف اجيب الاسئله بس الحل عليكم ههه 
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اسئله المحاضره الأولى :-
question:8
8. Find the order of magnitude of your age in seconds.
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problems:7&10
7.
Calculate the mass of an atom of (a) helium,
(b) iron, and (c) lead. Give your answers in grams. The
atomic masses of these atoms are 4.00 u, 55.9 u, and 207 u, respectively
10.
A small cube of iron is observed under a microscope. The
edge of the cube is 5.00
! 10"6 cm long. Find (a) the
mass of the cube and (b) the number of iron atoms in the
cube. The atomic mass of iron is 55.9 u, and its density is 7.86 g/cm3.
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مسائل المحاضره الثانيه :-
problems 4&6
A major motor company displays a die-cast model of its
fi
rst automobile, made from 9.35 kg of iron. To celebrate
its hundredth year in business, a worker will recast the
model in gold from the original dies. What mass of gold is needed to make the new model?
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6.
Two spheres are cut from a certain uniform rock. One has
radius 4.50 cm. The mass of the other is
five times greater.
Find its radius
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أن شالله يارب يكونو هم الاسئله انا جبتهم من الكتاب الانجليزي اللي هي منزلته لنا
اللي تجيب الحل
الله يخليها يارب ويوفقها
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