What is the quark composition of a proton?

• up down strange

• up up down

• up down down

• up strange strange

How many quarks and antiquarks are there?

• 3

• 6

• 9

• 12

What force holds the nucleus together?

• gravity

• weak interaction

• electromagnetism

• strong interaction

Which interaction is the weakest?

• gravity

• weak interaction

• electromagnetism

• strong interaction

What is the range of the strong interaction?

• 0.5 fm

• 1 fm

• 3 fm

• 5 fm

Which force is only attractive?

• gravity

• electrostatic

• strong interaction

• magnetic

Which of these is not a description of a kaon?

• quark antiquark

• baryon

• meson

• hadron

What is the quark composition of a baryon?

• three quarks

• 2 quarks and an antiquark

• one quark and one antiquark

• two quarks

Choose the baryon

• electron

• pion

• kaon

• neutron

Choose the meson

• sigma

• neutrino

• kaon

• proton