How big must the arclength of a circle be if there were 2 radians of rotation and the radius was 15 m?

I do not know

Explanation:

I never learned this stuff

I would say I do not know

So yeah

close lines strong magnet less close weaker

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.