Which equation is correct for wave speed?
A) wave speed = frequency x wavelength
B) wave speed = (1/period) x wavelength
C) both of these
D) neither of these
Answer: C
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A piano tuner knows that a key on the piano is tuned to the frequency of a test tuning fork when the fork and key struck at same time produce beats of
A) 0 Hz. B) 1 Hz. C) 2 Hz. D) 3 Hz. E) 4 Hz.
What features of the telescopic view of the Andromeda Galaxy, M-31, are also visible to the naked eye for our similar Galaxy?
What will be an ideal response?
Are cosmic rays electromagnetic waves? Why or why not?
What will be an ideal response?
The source of electrons lighting common lamps in your classroom is
1) the power company, 2) the electrical outlet, 3) atoms in the lamp filament, 4) the wires leading to the lamp, whereas the source of energy that lights a common lamp in your home is 5) the power company. 6) the electrical outlet. 7) atoms in the bulb filament. 8) the wires leading to the lamp.