What is the circumference of the LHC?

• 57.9 metres

• 12.9 km

• 27 km

Huge magnets inside the LHC help steer the protons beam. Are the magnets hot or cold?

• They get really hot.

• They are really cold.

What does the Proton Synchrotron do?

• lines up the protons

• washes the protons

• speeds up the protons

What are hadrons?

• a nickname that theoretical physicists give experimental physicists.

• particles composed of quarks.

• elementary particles.

How do physicists see proton collisions?

• a big magnifying glass.

• a special super-slow-motion camera.

• with lots of detectors and lots of data

A magnetic field changes the ____ of a charged particle

• Velocity

• Charge

• Direction of motion

• Mass

An electric field changes the ____ of a charged particle

• Velocity

• Charge

• Direction of motion

• Mass

What is the primary function of a particle accelerator?

• To slow down particles

• To collide particles at high speeds

• To generate electrical energy

• To observe the natural decay of particles

Which type of particle accelerator uses a single straight path for acceleration?

• Cyclotron

• Synchrotron

• Linear particle accelerator

• Lincac

In a cyclotron, particles move in:

• A straight line

• Circular paths of constant radius

• Circular paths of increasing radius

• Helix