If you break a bar magnet in half you’ll  

A rainbow is a result of atmospheric  

A step-up transformer steps up voltage by ten times. If voltage input is 120 volts, voltage output is (set up the ratio equation to solve)

A ball rolls off the edge of a table at the same time another ball drops vertically from the same table. The ball to hit the floor first is the  

Assume that 10 J of work pushes a charge initially at rest into an electric field. If the charge is then released, it flies back to its starting position with a kinetic energy of  

When current reverses direction in a wire, the surrounding magnetic field  

The current produced by voltage in a circuit is impeded by  

For every action force, there must be a reaction force that  

The work you do when pushing a shopping cart twice as far while applying twice the force is  

A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is