More water in the jar means slower vibrations and a deeper tone, a sound that can be recognized by its regularity of vibration. What are vibrations? *
A type of medium
A release of energy
Each of the glasses will have a different ____________________, or response to the frequency of sound, when hit with an object. *
Frequency
Pitch
Sound
Medium
The glass with the most water will have the lowest pitch while the glass with the least water will have the ____________________. *
Lowest
Highest
Most average
Largest median
What is frequency? *
What is energy? *
Answers
Answer:
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Explanation:
the source object
the molecules in the air (or another medium e.g. water)
the eardrum
When a sound is produced, it causes the air molecules to bump into their neighbouring molecules, who then bump into their neighbours, and so on. There is a progression of collisions that pass through the air as a sound wave.
Air itself does not travel with the wave (there is no gush or puff of air that accompanies each sound); each air molecule moves away from a rest point and then, eventually, returns to it.
When we hear something, we are sensing the vibrations in the air. The number of vibrations per second is known as the frequency, measured in Hertz (1 Hz = 1 vibration per second).
These vibrations enter the outer ear and cause the eardrum to vibrate too. We cannot hear the vibrations that are made by waving our hands in the air because they are too slow. The slowest vibration our human ears can hear is 20 times a second. That would be a very low sound.
The fastest vibration we can hear is 20,000 times per second, which would be a very high sound. Animals can hear different frequencies from humans. Cats can hear even higher frequencies than dogs, and porpoises can hear the fastest vibrations of all (up to 150,000 times per second).