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In measuring the period of a pendulum's motion with a stopwatch how could you best minimize the influence of reaction time?
In measuring the period of a pendulum's motion with a stopwatch, you can best minimize the influence of reaction time by measuring period at the maximum swing point, i.e. the point where the pendulum stops and then reverses. It is at that point that the pendulum is moving the slowest. You should also make your line of sight be perpendicular to the swing, in order to minimize parallax error; and you should have a mark of some kind that you can move around to the peak value, then recording the period between successive peak values.
What do you mean by time period of pendulum?
You know how when you pull a pendulum to the side and let it go, and then it swings away from you to the other side, but then it stops and turns around and swings back to you ? The period of the pendulum is the length of time it takes, after you let it go, to go away from you and then come back to your hand.
What kind of number is 3.14?
It is a rational number because it stops.
Is 3.14 a imaginary number?
No it is a rational number because it stops.
What is a collection of points on a staight path that goes on and on in opposite directions?
If we understand what you mean when you say "straight", then you could be describing a "line". -- But if it ever stops in one direction, then it's actually a "ray". -- And if it eventually stops in both directions, then it was a "line segment" all the time.
