pertaining to a mass of radioactive material in which the rate of a chain reaction increases with time
to be reflected many times, as sound waves from the walls of a confined space
the magnitude of an electric field at a point equal to the force that would be exerted on a small unit charge placed at the point
the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force
the smallest component of an element having the chemical properties of the element; the number of protons determines the identity of the element
the force that acts between bodies of like electric charge or magnetic polarity, tending to separate them
