What do ocean waves and sound waves have in common?
a. both are transverse waves.
b. both are longitudinal waves.
c. both are electromagnetic waves.
d. both exhibit the same particle-to-particle interaction.
e. both are mechanical waves.

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.