Which of the following mediums does a sound wave travel the FASTEST in?

• solid

• liquid

• gas

• vacuum

The 2 types of regions that make up longitudinal waves are:

• compressions and extensions

• compressions and rarefactions

• vibrations and transmissions

• compressions and transmissions

How does the temperature of a medium affect the speed of sound waves?

• As the temperature of a medium increases, sound waves travel more slowly through that medium.

• Temperature does not affect the speed of sound waves

• As the temperature of a medium increases, sound waves travel more quickly through that medium.

• As the temperature of a medium decreases, sound waves travel more quickly through that medium.

Which of the following will change if you turn up a radio's volume?

• Intensity and loudness

• Wave velocity and intensity

• Frequency and amplitude

• Intensity and pitch

Which statement is correct according to the image given?

• In 1, the observer hears a higher pitched sound and this is related to the Doppler effect.

• In 2, the observer hears a higher pitched sound and this is related to the Doppler effect.

• In 1, the observer hears a higher pitched sound and this is related to the Compressional effect.

• In 2, the observer hears a lower pitched sound and this is related to the Compressional effect.

The point where the rays meet is known as....

• optical axis

• the focal point

• refraction

• focal length

The following is a picture of what type of mirror?

• Convex Mirror

• Concave Mirror

• Plane Mirror

• Flat Mirror

If you stand 2m away from a plane mirror, how far away does your reflection appear to be from you?

• 1m

• 2m

• 4m

• 8m

What is the difference between a lens and a mirror?

• A lens has an optic axis and a mirror does not.

• A lens refracts light and a mirror reflects light

• A lens does not have a focal point, a mirror has a focal point.

• A lens reflects light and a mirror refracts light.

The diagram of a human eye illustrates a vision problem. Which of the following statements is correct?

• The vision problem is farsightedness. The type of lens to correct it is convex.

• The vision problem is nearsightedness. The type of lens to correct it is concave.

• The vision problem is farsightedness. The type of lens to correct it is concave.

• The vision problem is nearsightedness. The type of lens to correct it is convex.