阿摩線上測驗
3. Two objects, A and B, have a mass ratio of mA : mB = 2 : 1. If both objects have the same kinetic energy, what is the ratio of the magnitudes of their momenta, pA : pB?
(A) 1 : 1
(B) 
:1
(C) 2 : 1
(D) 4 : 1
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統計： A(0), B(3), C(2), D(0), E(0) #3840113
統計： A(0), B(3), C(2), D(0), E(0) #3840113
