Me fast

1.) which of the following materials is an insulator against the electric current?

a.) a rubber tire

b.) a light bulb filament

c.) copper wire

d.) a silver necklace

if i get the right answer you can be marked as brainiest

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Asher cycles 12 miles in 16 hours. what is his speed?