Properties of Waves and Polarization

Describe what the gradient represents on a distance-time and velocity-time graph.

• Speed and acceleration

• Distance and time

• Force and mass

• Energy and power

State the Principle of Moments.

• The sum of clockwise moments equals the sum of anticlockwise moments

• The sum of forces equals zero

• The sum of energy equals the sum of work done

• The sum of mass equals the sum of weight

Explain clearly how different areas of transport design reduce the impact force on the driver.

• By increasing the time of impact

• By decreasing the mass of the vehicle

• By increasing the speed of the vehicle

• By decreasing the distance traveled

What is the relationship between velocity-time and acceleration?

• Velocity-time is equal to acceleration squared.

• Velocity-time is the inverse of acceleration.

• Velocity-time is directly related to acceleration.

• Velocity-time has no relation to acceleration.

What can waves vary in?

• Pressure, electric or magnetic intensity, electric potential, or temperature

• Color and shape

• Size and weight

• Density and mass

What are mechanical waves?

• Waves that pass through a vacuum

• Waves that pass through a substance via vibrations of the substance

• Waves that do not require a medium

• Waves that are only visible

How do electromagnetic waves travel over large distances?

• By requiring a medium to propagate.

• Through the generation of static fields.

• By a vibrating electric field generating a vibrating magnetic field, and vice versa.

• By remaining stationary in space.

What type of electromagnetic wave is used in remote controls?

• Radio waves

• Infrared

• Ultraviolet

• Gamma rays

What is the effect of ionizing radiation on living tissues?

• It has no effect.

• It can cause damage to DNA.

• It makes tissues glow.

• It cools down the tissues.

What is the direction of vibration in longitudinal waves relative to the direction of wave propagation?

• Perpendicular

• Parallel

• Circular

• Random