# Chapter 20.1, Problem 20.1GI

### Essential University Physics: Volu...

3rd Edition
Richard Wolfson
ISBN: 9780321976420

Chapter
Section

### Essential University Physics: Volu...

3rd Edition
Richard Wolfson
ISBN: 9780321976420
To determine

To determine: The quark combinations in protons.

Answer: Option (c), uud is the quark combination of proton.

Explanation

Given info: The charge of upquark is +23e and downquark is 13e .

Explanation:

The charge of a proton is +e .

Write the expression for total charge associated with uud .

uud=+23e+23e13e=+e

Thus, the quark combination of proton is uud .

Conclusion:

Since, the charge of proton is +e and that of uud is also +e , option (c) is the correct answer.

Since, the charge of proton is +e and that of udd is 0 , option (a) is incorrect.

Since, the charge of proton is +e and that of uuu is +2e , option (b) is incorrect.

Since, the charge of proton is +e and that of ddd is 3e , option (d) is incorrect.

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