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Tju [1.3M]
2 years ago
11

A graph titled velocity versus time has horizontal axis time (seconds) and vertical axis velocity (meters per second). A line ru

ns from 0 seconds 5 meters per second to 5 seconds 25 meters per second. What is the initial velocity of the object represented by the graph? m/s.
Physics
1 answer:
erma4kov [3.2K]2 years ago
5 0

"Initial" means "as our story begins", or "when we arrive", or "when we start watching it", or "at the beginning of time".

You just told us that on the graph, the speed was <em>5 m/s</em> at zero seconds.     So that's the initial speed.

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Answer:

A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.

Explanation:

In Physics, Doppler effect can be defined as the change in frequency of a wave with respect to an observer in motion and moving relative to the source of the wave.

Simply stated, Doppler effect is the change in wave frequency as a result of the relative motion existing between a wave source and its observer.

The term "Doppler effect" was named after an Austrian mathematician and physicist known as Christian Johann Doppler while studying the starlight in relation to the movement of stars.

<em>The phenomenon of Doppler effects is generally applicable to both sound and light. </em>

An example of the Doppler effect is a police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase. This is so because when a sound object moves towards you, its sound waves frequency increases, thereby causing a higher pitch. However, if the sound object is moving away from the observer, it's sound waves frequency decreases and thus resulting in a lower pitch.

<em>Other fields were the Doppler effects are applied are; astronomy, flow management, vibration measurement, radars, satellite communications etc. </em>

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