What has a magnitude but no direction?

An electron is to be accelerated from a velocity of 1.50*106 m/s to a velocity of 9.00*106 m/s. through what potential difference must the electron pass to accomplish this?

A tape dispenser example wich simple machine

Is an airplane circling in preparation for a landing potential energy or kinetic energy?

You are sitting on a deck of your house surrounded by oak trees. You hear the sound of an acorn hitting the deck. You wonder if an acorn will do much damage if instead of the deck it hits your head. Let the mass of the acorn be 3.5 g.

How does sandpaper increase friction

What factors affect the speed of a wave?

What direction does air resistance act on an object that is falling straight down

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased