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.
340 ms\(^{-1}\)
380 m s\(^{-1}\)
400 m s \(^{-1}\)
680 m s\(^{-1}\)
Correct answer is A
speed of the sound wave = \(\frac{distance * 2}{time}\)
= \(\frac{408 * 2}{2.4}\)
: speed of the sound wave = 340 ms\(^{-1}\)
longitudinal
transverse
mechanical
a sound wave
Correct answer is B
In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave's advance.
This is in contrast to a longitudinal wave which travels in the direction of its oscillations. Water waves are an example of transverse wave.
15 hours
30 hours
45 hours
60 hours
Correct answer is C
No explanation has been provided for this answer.
high velocity electrons are abruptly stopped in metals
energy changes occur within the nuclei of atoms
energy changes occur within the electronic structure of atoms
electrons are deflected in very strong magnetic fields
Correct answer is B
Gamma rays are produced in the disintegration of radioactive atomic nuclei and in the decay of certain subatomic particles.
Gamma radiation is emitted by excited nuclei or other processes involving subatomic particles;
it often accompanies alpha or beta radiation, as a nucleus emitting those particles may be left in an excited (higher-energy) state.
1.22 x 10\(^{-10}\)m
4.10 x 10\(^{-10}\)m
3.90 x 10\(^{-10}\)m
5.50 x 10\(^{-14}\)m
Correct answer is D
de broglie wavelength formula in terms of kinetic energy:
λ = \(\frac{h}{\sqrt{2mE}}\)
λ = \(\frac{6.6 *10^{-34}}{\sqrt{2 *9.1*10^{-31} *100 }}\)
λ = 5.50 x 10\(^{-14}\)m