Count the cycles per second.
it's formula=1/time
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You just need to add up the frequency total one by one to find the cumulative frequency of a certain set of data.
find the mean in a set of frequency distribution
The length can be found by taking the larger number in the frequency group and subtracting it to find the range.
* To find the mean (or average) of a standard frequency table, you must firstly cross-multiply the frequncies with the independent variable in the left column. * Then, add up these products and divide by the total number of frequencies. * For grouped frequency tables, you must find a mid-point, a half-way value in each group, before cross-multiplying.
To get the wavelength of a wave simply divide the wavespeed with its frequency.