1 Summary of Basic Probability. 2  In the following, the capital letters A, B, or C are used to represent some event like it will rain tomorrow or a computer chip is defective. The notation P(A) then stands for the probability of event A. 3  An experiment is any process yields a result or observation.
A pendulum is a string or stick with a weight or bob on the end. The pendulum follows the law of falling objects[ âan invisible force, gravity, pulls the pendulum toward Earth. The period of time it takes. a pendulum to complete one full swing is simply called the period. Three variables affect the period: the length of the pendulum, the. size of the arc it makes, and the mass of the bob. In this activity, youâll discover what happens if you change one or more of the. variables.
Find out by taking a peek through the back door of your mantel. If you don't see a pendulum attached to the back of your clock movement, then your clock is regulated by a balance wheel. The pendulum/balance wheel is driven by a powerful spring. First, be sure that you have wound up the pendulum spring.Wind it up all the way.ind out by taking a peek through the back door of your mantel. If you don't see a pendulum attached to the back of your clock movement, then your clock is regulated by a balance wheel. The pendulum/balance wheel is driven by a powerful spring. First, be sure that you have wound up the pendulum spring.