Physicists use some basic terms when they look at motion. How fast an object moves, its speed or Velocity, can be influenced by forces. (Note: Even though the terms 'speed' and 'velocity' are often used at the same time, they actually have different meanings.) Acceleration is a twist on the idea of velocity.
Expungement is the legal process by which a court removes or erases all records of a criminal conviction, even if it is a felony conviction. Your conviction will not simply disappear on its own even if you wait 10 or 20 years - you have to take action (see how long does a felony stay on your record).
An Expungement is the removal of court and police records from public inspection. This does not include Motor Vehicle Administration records, which may have minor traffic violations, such as a speeding ticket. This process should take no more than 90 days unless there is an objection or an appeal. Each case costs $30 to process, which is submitted, to the clerk at the time of application.