Calculating Duration of Class: T2 - T1/T1

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SUMMARY

The discussion centers on calculating the duration between two time points, T2 and T1, using the formula |T2 - T1| / T1. This calculation determines how many intervals of length T1 fit within the duration from T1 to T2. For instance, with T1 set to 10 seconds and T2 to 60 seconds, the result is 5, indicating that there are five 10-second intervals between the two times. The purpose of dividing by T1 is to express the duration in terms of the number of complete intervals of T1.

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In the class, the teacher tried to find some measure that I didn't get. He subtracted two times, and divided by one of them.

\frac{| T2 - T1 | }{T1}

He found the duration and decided to divide by one of T. What was the purpose to divide by T?

T2 is the end time
T1 is the start time
 
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xeon123 said:
In the class, the teacher tried to find some measure that I didn't get. He subtracted two times, and divided by one of them.

\frac{| T2 - T1 | }{T1}

He found the duration and decided to divide by one of T. What was the purpose to divide by T?

T2 is the end time
T1 is the start time

The expression gives you the number of time intervals of length T1 in the interval from T1 to T2 (or from T2 to T1, if T2 < T1).

For example, let T1 = 10, and T2 = 60, and assume both are in seconds.
Then |T2 - T1|/T1 = (60 - 10)/10 = 50/10 = 5

There are 5 intervals of length 10 sec. between 10 sec. and 60 sec.
 

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