Which of the statements about thunder and lightning is correct.

• We hear and see them at the same time because they are mechanical waves.
• We hear thunder before we see lightning because sound travels faster than light.
• We see lightning before we hear thunder because light travels faster than sound.
• We see lightning before we hear thunder because light travels slower than sound.

As a wave spreads out from its center point the wave

• energy increase
• energy is the same but spread out more
• energy is decreasing and spread out more
• energy is decreasing and more consentrated

Which of the following statements about waves are true?

• They all require a medium to travel through.
• They begin as a disturbance or vibration
• All types of waves have the same speed
• They all carry equal amounts of energy, its just spread-out differently

Referencing the traveling wave below, determine the wavelength.

• 50 m
• 25 m
• 6 m
• 100 m
• 75 m

The reason we use polarized lenses is to

• allow more light rays into our eyes
• stop more intense light rays from entering our eyes
• stop light from reflecting off objects and entering our eyes.

A transverse wave measures 20 cm from the top of one crest to the bottom of the trough. What is the amplitude?

• 20 cm
• 10 cm
• 40 cm
• 5 cm

The string of a piano that produces the note middle C vibrates with a frequency of 262 Hz and a wavelength of 1.3 m in the air what is the speed of the wave?

• 341 m/s
• 201.5 m/s
• .005 m/s

The image below is showing what?

• Reflection
• Diffraction
• Destructive Interference
• Constructive Interference

Which one of the following is an example of an electromagnetic wave?

• sound waves
• water waves
• light waves
• mechanical waves

Which of the following claims can be supported from the data?

• Liquid substances such as water, allow the waves to travel faster than that of skull bones.
• The more dense the material, the faster the waves can travel through it.
• The less dense the material, the faster the waves can travel through it.
• Air is the substance that waves move the slowest in.