R1 R2
Plz explain to me how you solved them because I’m really struggling

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.