A parallel circuit is one in which there's a place where the flow of current
can split up and follow different paths.
An example might be:
Two lamps plugged into the same outlet and both turned on.
Current that comes out of the outlet splits up, and parts of it flow
through each lamp.
You need to give more info to your answer so i can help u
The time it takes for a point to reach 0 displacement from maximum displacement is

of a cycle. Thus, one period (

) will take

.
The frequency is simply

.
The speed is given by:
The motion of the stone consists of two separate motions: in air, with average speed

, and in the water, with average speed

.
The total distance covered is 127 m, and it is the sum of the distances covered in air and in the water:

(1)
and the total time taken is the sum of the time the stone travels in air + the time the stone travels in the water:

Since

, we can rewrite (1) as

We have now a system of 2 equations with 2 unknown variables:

And if we solve it, we find


Which means that the stone travels for 7 seconds in air and for 5 seconds in the water.
If they are Conductive medals then yes.
They do attract or push away, cause sometimes they love each other or hate each other. x'D lol