Acurrent can be produced in a coil of wire
when a core of iron rests in the coil
as a core of iron is being thrust through the coil
when a magnet rests in the coil
as a magnet is being thrust through the coil

i don’t know what the answer is i wish i

the answer is 3.1 his answer is wrong mines is right

wavelegth as in spectrum red oygbiv

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.