calculate period of a pendulum

9:10

1:54

5:08

5:08

5:08

5:08

5:08

5:08

5:08

5:08

5:08

1:07:11

9:45

9:49

15:11

10:25

3:05

13:09

9:59

4:08

10:18

10:00

2:50

3:58

5:07

5:59

5:07

5:59

4:30

4:30

6:06

کوتاه

4:43

کوتاه

4:18

1:51

1:43

5:15

12:48

5:15