1. The frequency of a tuning fork that vibrates 5000 times in 4 s is _______.   1750 Hz   1250 Hz   1500 Hz   1000 Hz   Hint Half-n-half Clue   2. A low-pitched sound is very shrill in nature.   True   False   3. If the time period of vibration of a tuning fork is 1 / 768 of a second, its frequency of vibration is   1280 Hz   768 Hz   512 Hz   1024 Hz   Half-n-half Clue   4. The pitch of a note depends on the _______ of the vibrations.   amplitude   frequency   5. The frequency of a note that is one octave higher than a note of 512 Hz is _______.   520 Hz   544 Hz   768 Hz   4096 Hz   Half-n-half Clue   6. The velocity of a wave is equal to the product of the _______ and the wavelength.   time period   frequency   amplitude   Half-n-half Clue   7. When the movement of a vibrating particle is perpendicular to the direction of the wave, it is termed _______ wave motion.   transverse   longitudinal