If youâve ever been to a science museum or taken a physics class, youâve probably encountered an example of a pendulum wave. This video shows a large-scale pendulum wave contraption built on private property in the mountains of North Carolina, near Burnsville.he length of time it takes a ball to swing back and forth one time to return to its starting position is dependent on the length of the pendulum, not the mass of the ball. A longer pendulum will take longer to complete one cycle than a shorter pendulum.
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The chi square test is used to test a distribution observed in the field against another distribution determined by a null hypothesis. Being a statistical test, chi square can be expressed as a formula.When written in mathematical notation the formula looks like this : When using the chi square test, the researcher needs a clear idea of what is being investigating. It is customary to define the object of the research by writing an hypothesis.Chi square is then used to either prove or disprove the hypothesis.Back to the Index. Requirements. Prior to using the chi square test there are certain requirements that must be met. These are 1  :-. The data must be in the form of frequencies counted in each of a set of categories.hi square is then used to either prove or disprove the hypothesis. Back to the Index. Requirements. Prior to using the chi square test there are certain requirements that must be met.