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.
4.33 x 108ms-1
4.00 x 108ms-1
2.25 x 108ms-1
1.33 x 108ms-1
Correct answer is C
\(_an_w = \frac{4}{3} = \frac{\text{speed of light in air}}{\text{speed of light in water}}\)
\(\frac{4}{3} = \frac{3 \times 10^8}{x}\)
x = \(\frac{9 \times 10^4}{4}\)
= 2.25 x 108m/s
4.00s
2.50s
0.25s
0.04s
Correct answer is C
F = \(\frac{v}{\lambda} = \frac{0.2}{5 \times 10^{-2}} = 4Hz\)
T = \(\frac{1}{f} = \frac{1}{4} = 0.25s\)
Which of the following statements about a progressive mechanical wave is correct?
it can be a plane polarised
its energy is localised at specific points of its profile
it does not require a material medium for its propagation
its frequency remains constant as it travels between different media
Correct answer is D
No explanation has been provided for this answer.
The pressure exerted by a given mass of gas in a container
decreases if the container is heated
increases if the molecules of the gas move faster
increases if the container is doubled
decreases as the kinetic energy of the gas molecules inceases
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is correct?
the density of a liquid decreases when it expands
the density of a liquid increases when the liquids are heated
the real expansivity of a liquid is less than its apparent expansivity
a liquid changes to solid when heated to a sufficiently high temperature
Correct answer is A
No explanation has been provided for this answer.