What is the term for the total distance covered divided by total time taken, regardless of direction?

What is the term for the amount of matter contained in an object?

Which device converts light energy directly into electrical energy using the photovoltaic effect?

What is the critical angle in optics?

Which type of mirror is used in vehicle headlights to focus light?

What is the term for a substance that does not allow heat or electricity to pass through it easily?

What is the term used for the resistance of a body to change its state of motion?

Which law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure?

Which law states that an object at rest stays at rest unless acted upon by an external force?

What is the name of the force that holds protons and neutrons together inside the nucleus?

Which law states that planets move in elliptical orbits with the sun at one focus?