Why are the volcanoes on the Hawaiian Islands northwest of the big island of Hawaii no longer erupting?

Answer in your own words

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

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