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).
A misdemeanor domestic violence offense can result in fines, a requirement to stay away from the alleged victim, and a short time in jail or even none at all. With a felony, the time spent in jail is much longer; it could be up to three years. Expungement for misdemeanor charges is much easier than for felonies.