Hai hạt bụi trong không khí cách nhau 3cm mỗi hạt mang điện tích -9,6.10 mũ -13C. A )Tính lực đẩy tĩnh điện giữa hai hạt B ) tính số electrong dư trong mỗi hạt bụi biết diện tích củ mỗi electrong -1,6.10 mũ -19C

a. is the answer because they are not shared

the answer is b, have negligible mass

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.