Why are earbud wires for an mp3 player coated with plastic
1, to better conduct the sound
2, to insulate the wires
3, so they look good
4, so they dont break

When you turn on a battery-operated device, an electrical circuit is

What happens to an isotope during radioactive decay?

Atruck with 34-in.-diameter wheels is traveling at 55 mi/h. find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes: