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.Management Sciences
Category: Waves
The normal ear is the most sensitive in the frequency range___________________?
A. 20000 to 30000 hertz
B. 10 to 20 hertz
C. 2000 to 4000 hertz
D. 6000 to 8000 hertz
Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?
A. Dopplers effect
B. Interference of waves
C. Beats phenomena
D. All of these
Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?
A. Longitudinal
B. Transverse
C. Periodic
D. both A and C
The beats frequency (sensible) for a human car is _____________________?
A. 42Hz
B. 7 Hz
C. 256Hz
D. 262Hz
The speed of stationary waves in a stretched string are independent of___________________?
A. Number of loops
B. Tension in the string
C. Point where string is plucked
D. both A and C
Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________?
A. isothermal law
B. adiabatic law
C. isochoric law
D. all of the above
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