The doppler effect is the change in observed frequency due to
a. the type of medium the wave is in
b. the type of wave
c. the original frequency of the source
d. the motion of the source or observer

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope. describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two