The diagram shows two charged objects, X and Y. Based on the field lines, what are the charges of the
objects?
X: positive
Y: negative
X: negative
Y: positive
X: negative
Y: negative
X: positive
Y: positive

this could be newton#'s law of cooling. the cooling curve is exponential

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.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

elctricity and magnet is conversion to it