In which Earth system does the rock cycle take place? cryosphere
atmosphere
geosphere
biosphere

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

What is the work done by the electric force to move a 1 c charge from a to b?