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Physics - Chapter 26
Question | Answer |
---|---|
What is the origin of all sound? | vibration |
_______ is our subjective impression about the frequency of sound. | Pitch |
What type of wave is sound? | longitudinal |
What is the name given to a region of compressed air in a sound wave? | compression |
What is the name given to a region of lower pressure air in a sound wave? | rarefaction |
Which type of medium carries sound the loudest and fastest? | solids |
Which type of medium carries sound the least loud and the slowest? | gas |
The is 330 m/s at zero degrees C. What is it? | speed of sound |
What happened to the speed of sound as the temperature increases? | increases |
The ___ of a sound is proportional to the square of the amplitude. | intensity |
The unit of intensity of sound is the ____> | decibel |
The ____ of an object is the special set of frequencies that together form the special sound. Its the reason when you drop a wood block and a wrench on the floor they sound different | natural frequency |
_____ occurs when the frequency of a forced vibration on an object matches the object's natural frequency causing its amplitude to increase. | resonance |
_____ are the periodic variation in the loudness of sound. | Beats |
Any sound that has a frequency below 20 Hz is called ______. | infrasonic |
Any sound that has a frequency above 20 000 Hz is called_____. | ultrasonic |