Author Question: Calculate the reaction energy (Q value) for the reaction 7Li + 1H 4He + 4He, given the following ... (Read 64 times)

cdr_15 · **on:** Jul 29, 2018

Calculate the reaction energy (Q value) for the reaction 7Li + 1H 4He + 4He, given the following masses:
7Li: 7.016005 u
1H: 1.007825 u
4He: 4.002603 u
(1 u = 931.5 MeV/c2)

A) 15.37 MeV B) 17.35 MeV C) 17.53 MeV D) 13.57 MeV E) 13.35 MeV

Question 2

A 4.00-kg mass and a 9.00-kg mass are being held at rest against a compressed spring on a frictionless surface.

When the masses are released, the 4.00-kg mass moves to the east with a speed of 2.00 m/s. What is the velocity of the 9.00-kg mass after the masses are released?
A)

2.00 m/s west
B)

0.888 m/s west
C)

0.500 m/s east
D)

4.50 m/s west
E)

0.500 m/s west