Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
1.0 x 104Nm-2
2.0 x 103Nm-2
1.5 x 103Nm-2
1.0 x 103Nm-2
Correct answer is D
Density of liquid = \(\frac{1 {\times} 10^3}{2.5 {\times} 2 {\times} 4}\)
= 50kgm3
pressure heg = 50 x 10 x \(\frac{4}{2}\)
= 1 x 103Nm-2
A piece of wire gauze can be made to lie on water because
the wire guaze is less dense than water
the water molecules repels the wire guaze upwards
the water surface has the effect of an elastic thin skin
of the cohensive forces between the water and the wire guaze molecules
Correct answer is C
No explanation has been provided for this answer.
1000 N
700 N
110 N
10 N
Correct answer is D
Volume of water displaced = volume of cube
therefore, 0.1 x 0.1 x 0.1 = 0.001m3
mass of H2O = 0.001 X 1000
= 1kg
upthrust = mg
= 1 x 10
=10N
7.0 x 1011Nm-2
7.5 x 1011Nm-2
8.5 x 1011Nm-2
9.0 x 1011Nm-2
Correct answer is B
Young's modulus = \(\frac{F}{A}\) \(\div\) \(\frac{e}{L}\)
= \(\frac{20}{8 \times 10^{-7}}\) \(\div\) \(\frac{10^{-4}}{3}\)
= 7.5 x 1011Nm-2
90.0%
85.0%
80.0%
65.0%
Correct answer is C
Efficiency = output x 100
= \(\frac{\frac{200 {\times} 10 {\times} {6}}{10}}{1500}\) x \(\frac{100}{1}\)
= 80%