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What is the difference between clockwise and counterclockwise?
Clockwise and counterclockwise are opposite directions of motion.Clockwise motion (negative mathematical direction) designates circular motion around a pivot point similar to that of the hand of a timepiece - e.g. top, then right, then bottom, then left, then top again.Counterclockwise motion (positive mathematical direction) designates the opposite direction of motion - e.g. top, then left, then bottom, then right, then top again.
What is the function of grid?
it accelerate the motion of electron emitted by the filament if given a positive charge, similarly if negative voltage to grid the current flow through the grid is reduced. the more positive grid shows less current.
Why are positive and negative numbers used on a harmonic motion graph?
Since amplitude can vary, it is inconvenient to set "0" at the maximum swing point. This can move your zero and all successive measurements with just a touch. Additionally, "simple harmonic motion" is easily described by combinations of the sine and cosine functions, and they yield positive and negative values of equal magnitudes. So it is *easier* to set zero at "mid span".
When working with the square root of a number when would you have only a positive answer and when would you have both a positive and negative answer?
Every positive number has two square roots . . . the same number with both signs.It's possible that you may not need both of them. In a Physics problem, for example,or in a motion problem (When do two trains meet ? etc.), or a math word problem,the negative one often makes no sense and you just ignore it. But as far as the mathalone is concerned, both of them are always there.
How can you obtain the average velocity from a displacement time graph?
-- Pick two points on the graph. -- Find the difference in time between the two points. -- Find the difference in displacement between the same two points. -- (Difference in displacement) divided by (difference in time) is the average Speed . You can't tell anything about velocity from the graph except its magnitude, because the graph displays no information regarding the direction of motion.
