Explain how the essential features of special relativity imply that a beam of light from a fast moving spaceship will always be observed to moving at the speed of light

What will be an ideal response?


The essential features are: The laws of physics are the same everywhere, there is no absolute motion, and time is a separate dimension. In order for the laws of physics to be the same everywhere, the speed of light is a constant of nature. That means that it will always be the same independent of the motion of the source or observer.

Physics & Space Science

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Can an element decay "forward" in the periodic table, to a higher atomic number?

A) No, in fact elements cannot alter their atomic number by radioactive decay. B) No, but an element can decay to a lower atomic number. C) Yes, by alpha decay. D) Yes, this can occur by means of both beta decay and alpha decay. E) Yes, by beta decay.

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An object moving in a circle undergoes centripetal acceleration

a. True b. False Indicate whether the statement is true or false

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Sound is a(n) ______________ wave

Fill in the blank(s) with correct word

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