In non-ferromagnetic materials, most of the electrons are

paired and spinning in opposite directions
paired and spinning in the same direction
unpaired and spinning in opposite directions
not spinning

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

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?