You hold a ruler that has a charge on its tip 2 cm above a small piece of tissue paper to see if it can be picked up. the ruler has −14 µc of charge. the tissue has 3 g of mass. what is the minimum charge required to pick up the tissue paper?

Explanation:

It is known that the relation between force and mass is as follows.

                            F = mg .......... (1)

where,    F = force

              m = mass

              g = acceleration due to gravity

Also,     F = .......... (2)  

Therefore, equating equations (1) and (2) as follows.

                = mg

Putting the given values into the above formula as follows.

              = mg

            = 3 g \times 9.8[/tex]

              C

Therefore, the minimum charge required to pick up the tissue paper is C.

scientific laws are the result of testing theories and proving them to be facts.

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.