Passage VI
Quarks constitute 1 of the 3 classes of elementary particles that form all matter in the universe. Three quarks bound together form a type of particle called a baryon. A quark's effective mass (mass when bound to other quarks) is greater than its single-quark mass (mass when unbound). In addition, all quarks possess a property called spin. A quark's spin can be oriented in 1 of 2 directions, spin-up (
) or spin-down (
).
Table 1 lists the symbol, electric charge, and approximate single-quark mass for each of the 6 quarks.
Table 2 gives the symbol, mass, quark content, and quark spins for several baryons.
37. Is the information in Tables 1 and 2 consistent with the known electric charge for the proton?
Your Answer is
Correct Answer is D
Explanation
According to common sense, protons carry one unit of positive charge.
Look at table 2 and find that the quark content of proton is uud;
Then correspond to table 1, and add the charges of the three to get +1, so it meets