Question

The galaxy Palioxis is receding from the Milky Way at a speed of 0.35c. Another galaxy, Euthenia, is receding from the Milky Way in exactly the opposite direction, but at a speed of 0.45c. (a) For an observer in Palioxis, how fast is the Milky Way receding from them? Explain from them? Explain (b) For an observer in Palioxis, how fast is Euthenia receding f Imagine two muons, symbol μ-, moving towards each other with equal and opposite speeds. If they collide then it is possible they can undergo the reaction μ-+ μ- μ-+ μ-+ μ-+ μ+ , where μ+ is an antimuon (e) E xplain why there is a threshold kinetic energy fr this reaction, and determine what it is. (d) Calculate the threshold speed of the initial muons for this reaction to occur.

Answer 1

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