What is the multiple choice???
Answer:
The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
Answer:
The frequency is f = 6Hz
Explanation:
Given
The time division setting is 
The number of division is 
The total time for 10 division can be mathematically obtained as


From the question the time for 3 cycle is

Then the for one cycle which equivalent to the Period


The frequency is generally given as 
Now substituting values we have

