Halogens are the most reactive elements. Halogens include: <span>fluorine, chlorine, bromine, iodine, and astatine</span>
Answer:
(a) Both the charges are positive or negative.
(b) Teh value of each charge is 1.53 x 10^-5 C.
Explanation:
Spring constant, K = 340 N/m
Natural length, L = 0.4 m
stretch, y = 0.033 m
(a) Let the charge on each sphere is q and they repel each other so the nature of charge of either sphere may be both positive or both negative.
(b) The electrostatic force is balanced by the spring force.

Answer:
A friction
Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
The dog shakes to get the water off of him and to get dry. These fast movements replicate when we drain the water out of our hair and when we blow dry our hair.