Hi I believe it is b. sorry if this isnt found to be helpful.
Answer:
That right there is what caused the world to end my friend
Explanation:
Answer:

Explanation:
For pendulum A: Length = L and gravity = g
The frequency of pendulum A is given by

Here, f is the frequency, L be the length
... (1)
For pendulum B: Length = 2L, gravity = g
The frequency of pendulum B is given by
.... (2)
Divide equation (1) by (2)

I believe the answer would be A. because a magnet has both a south and a north pole, and electrical charges are formed by positive and negative forces. Hope I helped!