Which of the following can be classified as a substance? A. Bar of gold
B. Newspaper
C. Nail polish
D. Chocolate chip cookie

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?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols