* :السؤال العاشر سقط جسم من السكون من ارتفاع 10m
عن سطح الأرض، بإهمال مقاومة
الهواء، فإن الزمن اللازم لوصوله الأرض بوحدة ثانية يساوي
a.1.4
b.2
c.5

An electric current is flowing through the cord below. what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

What is the angular momentum of the bar about the axle?

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.