The doppler effect is best known as a change in the of a wave as the source is moving with respect to the observer. 35 points pls answer

"Frequency"

Explanation:

As the source is moving towards (or, away from) the observer, the wave (for example, sound, ultrasound, and electromagnetic wave) will appear to have higher (lower) frequency. This relates to an apparent shorter (longer) wavelength. A common example is the siren of an ambulance or fire truck quickly passing by, sounding with higher pitch on approach and lower pitch on departure.

Frequency

Explanation:

would be false hope this out

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever