22.4 Particle Physics

What is the order of the fundamental interactions from strongest to weakest?

• strong, electromagnetic, weak, gravitational

• strong, electromagnetic, gravitational, weak

• strong, gravitational, electromagnetic, weak

• gravitational, strong, electromagnetic, weak

Which of the following fundamental interactions are effective over a long range?

• the gravitational and strong interactions

• the electromagnetic and weak interactions

• the gravitational and electromagnetic interactions

• the strong and weak interactions

Which of the following statements about leptons is correct?

• Leptons are made up of quarks.

• Leptons are fundamental particles.

• Leptons participate in all four fundamental interactions.

• Leptons participate only in the weak interaction.

Which of the following statements about hadrons is correct?

• Hadrons are always made up of three quarks.

• Hadrons are fundamental particles.

• Hadrons participate in all four fundamental interactions.

• There are only six types of hadrons.

Hadrons can be further divided into two classes:

• mesons and quarks.

• mesons and baryons.

• quarks and baryons.

• leptons and baryons.

All mesons are _________ . Because of this, they are not constituents of normal, everyday matter.

• stable

• temporary

• unstable

• short lived

All hadrons are composed of two or three fundamental particles, which are called

• gluons.

• quarks.

• leptons.

• muons.

The most common examples of baryons are _______________, which are constituents of normal, everyday matter.

• protons and neutrons

• protons and electrons

• electrons and neutrons

• leptons and neutron

The difference between mesons and baryons is due to the _______________ that compose them.

• energy levels

• densities

• number of quarks

• mass variations

According to the standard model, which field particles mediate the strong force?

• gluons

• bosons

• gravitons

• photons