Which type of wave does not require a medium in which to travel?
sound
water
light
mechanical

What are two reasons for why a species might disappear from the fossil record?

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Adoença vitiligo afeta qual doença do corpo?