A sub-atomic particle os mass 0.113(adsbygoogle = window.adsbygoogle || []).push({}); ucollides head-on and elastically with a stationairy neutron. The neutron moves off with a

speed of 3.8 x 10^6 (power 6).

I am having a number of difficulties with this question. For instance, whats the mass of one neutron in terms ofu

please forgive me for asking such a newbie question but what does a 'head-on collision mean'

and why is it that the equation for principle of momentum

(m1u1+m2u2=m1v1+m2v2)

would not necessay apply if the sub-atomic particle had a much greater initial speed.

what does this mean?

and why is it that we are applying the equation in the first place.

Thanks

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# Homework Help: Collision of subatomic particles

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