سؤال للاستاذ/علي

[داعية المستقبل]

السلام عليكم د.علي
اختبرت 203 وكان فيه كم سؤال ماعرفت حلها
لو تقدر تشرح لي كيف احلها مشكور

A fir wood board floats in fresh water with 60% of its volume under water. What is the density of the wood(Pwater=1 g/cm^2(
a) 0.06 gm/cm^3
b) 0.6*10^-3 kg/cm^3
c) 1 gm/cm^3
d) 0.6 gm/cm^3



The pressure below of liquid does not depend on
a) The acceleration of gravity
b) The density of liquid
c) The height of liquid
d) The area of liquid surface




If you wanted to double the total oscillation energy in simple harmonic motion of a mass on a spring, you should change the amplitude by a factor of
a) 0.5
b) 0.1
c) 2.0
d) 4.0




The period of a simple pendulum is measured on Earth to be T . If the same pendulum is taken to the Moon, its period on the Moon's surface will be
a) less than T
b) greater than T
c) equal to T
d) non of above

وجزاااااااااااك الله خير الجزاء......