The doppler effect is the increase or decrease in the frequency of sound, light, or other waves as the source and observer move toward or away from each other.
Answer:
The answer is: It is difficult to tell if fluoride causes this cancer
Explanation:
edgenuite said
<span>So we want to know what physical quantity represents the wavelength of a wave. Waves have a few phyiscal quantities that are used to describe them. Frequency, amplitude and wavelength. Frequency is the number of oscillations in a specific time interval, amplitude is the maximal elongation of a wave and wavelength is the distance from one point ona a wave to the next similar point. So the correct answer is B. </span>
Answer:
Yes the color changes. If the star is moving away from the earth the color of the star is shifted towards red (red-shift).
This is similar to the change in sound from an approaching train whistle (higher pitch) or a receding train whistle (lower pitch) - the Doppler Effect.
Note that the equations for the Doppler Effect for sound and for light are different - sound travels thru air but no such medium can be identified for light.
From the Question, the melting point of a solid that melts above 
can be measured by:
- The melting point of solids can be measured by using electrically heated apparatus.These are used for even higher melting points.
- Also, by using Kjeldahl flask method we can determine the melting point of solids up to
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