Probing the Heart of Matter

What is an Electric Field?

• Where a particle has electric potential

• A region where a particle with mass experiences a force

• A region where a charged particle experiences a force

• Where there is a constant electric field strength

In Coulomb's law, teh force between two charged particles is

• proportional to the distance between them

• directly proportional to the distance between them

• inversely proportional to the distance between them

• inversely proportional to the square of the distance between them

Equipotential lines are always

• The same distance apart

• increasing in distance apart

• the same value

• the same charge along the line

Electric field strength can be defined as

• the force felt by a charge

• the gradient of electric potential

• the energy per coulomb in a field

• the line of equal potential

A resultant force is required for circular motion. This is fundamentally due to

• Newton's 1st law

• Newton's 2nd law

• Newton's 3rd law

• Centripetal force

The feeling of weightlessness arises from

• the lack of a normal contact force on an object

• the lack of forces on an object

• the lack of a resultant force on an object

• the lack of gravity on an object

Antimatter can have opposite

• mass

• energy

• lepton number

• size

a baryon consists of how many quarks?

• 0

• 1

• 2

• 3

A hadron consists of

• quarks

• protons

• neutrons

• leptons

A meson consists of

• 2 quarks

• 2 quarks and one antiquark

• a quark and an antiquark

• 2 antiquarks