## College Physics (7th Edition)

a). The answer is (1). A neutron is udd, so the anti-neutron is (1). b). $q(n bar) = (\frac{-2e}{3}+\frac{e}{3}+\frac{e}{3})=0$ Hence proved that the charge is correct.
a). The answer is (1). A neutron is udd, so the anti-neutron is (1). b). $q(n bar) = (\frac{-2e}{3}+\frac{e}{3}+\frac{e}{3})=0$ Hence proved that the charge is correct.