Answer:
Thorium 227 (also known as Radioactinium)
There is no image!?...was there meant to be something attached?
Answer:
0.230 s
Explanation:
The period is the length of time from one peak to the next. If it takes the oscillator 0.115 s to go from the lowest point to the highest point, then it takes another 0.115 s to return to the lowest point. So the period is 0.115 + 0.115 = 0.230 seconds.
Explanation:
Given that,
Distance between two long wires, d = 16 cm = 0.16 m
Current in one wire, 
Current in wire 2,
The magnetic force per unit length of one wire on the other is given by the following expression as :



The current is flowing in opposite direction, the magnetic force acting on it is repulsive. Hence, this is the required solution.