1. The problem statement, all variables and given/known data Given the reactions: p + 9 Be --> 10B + "gamma" p + 9 Be --> 9B + 1n p + 9 Be --> 9Be + 1p p + 9 Be --> 8Be + 2H p + 9 Be --> 7Be + 3H p + 9 Be --> 6Li + 4He Calculate: a) Q-value b) kinematic threshold energy of the proton c)threshold energy of the proton for the reaction d) minimum kinetic energy of the products 2. Relevant equations 3. The attempt at a solution Attempt: I have worked out part a) for each. But am not sure what the difference between b & c are? Any ideas? For c) I thought the equation would be: KE_threshold = -Q*(mb+mB)/(mB+mb+ma) Thanks for any thoughts!