What would be the most accurate way of measuring time for one oscillation with the help of stop watch?

Using a stopwatch, which would be the most accurate way to measure the tome for one oscillation of the pendulum? A pendulum swings backward and forwards passing through the center, the middle point of the oscillation.

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Why should you calculate the period from 25 oscillations instead of just 1 oscillation?

The more oscillations you measure, the more accurate will be your result for the average oscillation. That's because when you divide by the number of oscillations to take the average, you also divide your measurement uncertainty by that number. This is true up to a limit. How do you accurately measure the length of a pendulum? The length of a simple pendulum is determined by measuring the length of thread l by meter scale and radius of bob r by Vernier callipers. The effective length L is obtained by adding the two, i.e., L=l+r.

You can also ask can random errors be corrected?

Random errors cannot be eliminated from an experiment, but most systematic errors can be reduced. What questions have no answers? Mind Blowing Questions When did time begin? Did we invent math or did we discover it? Where does a thought go when it's forgotten? Do we have free will or is everything predestined? Is there life after death? Is it really possible to experience anything objectively? What are dreams? What is the goal of humanity?

Moreover, what is a unanswerable question?

not capable of being answered; not having a known or discoverable answer: an unanswerable question. Correspondingly, what has a ring but no finger? A lot of users have been wondering why is the answer to the riddle is the telephone. Taking the first line into consideration, "ring" here describes the sound a telephone makes when a call comes through.

What has 13 hearts but no organs?

deck of playing cards Q: What has 13 hearts, but no other organs? A: A deck of playing cards.