Question

1) A decibel is related to the idea of _____ (Sound is wrong)

- Loudness

- Sound

- Energy

- Intensity

2) Lambda, the wavelength, is the distance between two successive ________ (Waves is wrong)

- waves

- frequencies

- sources of sound

- crests

3) What determines the speed of a wave? (its frequency is wrong)

- The source of the wave

- its frequency

- the medium it's traveling in

- its wavelength

Answer 1

1) decibel is a unit used to measure the intensity of a sound i.e. in common tongue it gives a idea of loudness of sound.

2) wavelength is the distance between two successive crests of a wave.

3) wave speed depends upon the medium through which the wave is traveling. Only an alteration in the properties of the medium will cause a change in the speed.The wavelength or frequency of a wave does not affect the speed at which the wave travels. Two different waves travel with the same speed when present in the same medium.