Give the quark composition of (i) the proton and (ii) the anti-neutron - Leaving Cert Physics - Question j - 2015

The anti-neutron is composed of three anti-quarks: two anti-up quarks and one anti-down quark. This can be represented as:

ar{u} ar{u} ar{d}

where '\bar{u}' denotes the anti-up quark and '\bar{d}' denotes the anti-down quark.

The symbol for a NOT gate is typically represented as follows:

      _______
     |       |
 ---->|  NOT  |----
     |_______|

The truth table for a NOT gate is:

Input	Output
0	1
1	0