The frequency of a wave is the number of waves that passes through a point in a certain time. The less waves that pass in a period of time the lower the frequency of the wave. The more waves that pass in a period of time the higher the frequency of the wave. When measuring wave length the time period used is usually one second.
Answer:
heat, I think
when quenching knife blades you heat them up until they are no longer magnetic
Physics is the fundamental (basic) science because all other sciences are derived from Physics.
The normal acceleration in the United States is zero to sixty time. The average rate on ordinary cars was between 3 and 4 m/s2