Which two statements are true?
a.) the definitions for electric force and electromagnetic force are identical.
b.) electric forces and magnetic forces are different aspects of a single electromagnetic force.
c.) the operation of a motor depends on the relationship between electric and magnetic forces.
d.) a magnet must be moving for a magnetic force field to exist.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Witch theory suggests all living things are made up of cell or cells