Which statement accurately describes the interaction between the foot and sidewalk as a person moves forward along the sidewalk in the direction of the arrow (forward)?

• The foot pushes forward on the sidewalk; the sidewalk does not push forward on the foot.

• The foot pushes forward on the sidewalk; the sidewalk pushes forward on the foot.

• The foot pushes backward on the sidewalk; the sidewalk pushes forward on the foot.

• The foot pushes backward on the sidewalk; the sidewalk pushes backward on the foot.

In the diagram, the top wave is wave X and the bottom wave is wave Y. These waves are similar types of waves with the same amplitude travel in the same medium. Compared to wave X, which statement is correct?

• Wave Y has less speed.

• Wave Y has less less energy.

• Wave Y has lower frequency.

• Wave Y has a shorter wavelength.

Based on the following information, which of these is the correct element represented? (Yellow = Electron, Blue = Neutron, and Red = Proton.)

Refer to the diagram to the left. Which statement is a correct comparison of the red color to the violet color in the visible light portion of the electromagnetic spectrum?

• Violet has a higher frequency and longer wavelength than red.

• Violet has a higher frequency and a shorter wavelength than red.

• Violet has a lower frequency and longer wavelength than red.

• Violet has a lower frequency and a shorter wavelength than red

Which part of the diagram shows evaporation occuring?

• Leg A

• Leg B

• Leg C

• Leg D

• Leg E