The quality of a note produced by a vibrating string is determined by the
pitch of the note
tension of the string
material of the string
presence of overtones
thickness of the string
Correct answer is A
No explanation has been provided for this answer.
Which of the following is correct about light and sound waves?
Both of them are associated with energy transfer
Both of them need material media for propagation
they are both longitudinal waves
their velocities in air are equal
Both of them can be polarized
Correct answer is A
No explanation has been provided for this answer.
600m
400m
330m
328m
165m
Correct answer is C
x = vt/2 = \(\frac {330 \times 2} {2}\) = 660/2 = 330m
Which of the following have the longest wavelengths?
Infra-red rays
Gamma rays
X-rays
Ultra-violet rays
Radio waves
Correct answer is E
No explanation has been provided for this answer.
3.0Hz
6.0Hz
12.0Hz
27.0Hz
73.5Hz
Correct answer is B
λ = 3.5cm V =D/T = 31.5/1.5 = 21; f = V/ λ = 6.0