A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?

How does something become charged using friction?

Why aren't all materials magnetic? Include in your response an explanation of the relationship between spinning electrons and the direction of the magnetic fields they produce in magnetic and non-magnetic materials.

A spherical planet has twice the mass and twice the radius of the earth. if a man weighs 810 n on earth, what would his weight be on the surface of that planet?

V1T2 = V2T1 is an expression of Charles' Law. a. True b. False

What is the Milgram experiment?

Which statement is true about the atom? A: it contains positive electrons, uncharged protons and negative protons. B: it contains uncharged neutrons, positive electrons and negative protons.

Steel objects can become temporary magnets because they are mainly composed of which element?

How long does it takes the sun to rotate the earth?

Which explains how winds move?

Why is it important to develop alternative energy sources