You are at the controls of a particle accelerator, sending a beam of 2.10×10^7m/

Question

You are at the controls of a particle accelerator, sending a beam of 2.10×10^7m/s protons (mass m ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown element. All such protons rebound with a speed of 1.80×10^7 m/s. Assume that the initial speed of the target nucleus is negligible and the collision is elastic.

A)Find the mass of one nucleus of the unknown element. Express your answer in terms of the proton mass (m).

Can you give me the answer form as in m = or the answer is= . because i have asked others and the answer they give me is weird and i am not understanding what the actual answer to A is. thank you

Explanation / Answer

Same question is already solved here beautifully!!!Only values differ by a bit!!! http://answers.yahoo.com/question/index?qid=20100227201901AAlwH8e Hope this helps!!!

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