Answer:
The atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus
Answer:

Explanation:
The magnitude of the magnetic force is

To find the angle, we make
subject of the formula



Answer:
By conservation of energy, it can climb up to a height equal to that it went down before. However, due to the friction in the machines, the total mechanical energy of the roller coaster will decrease. As a result, the first "hill" of many roller coasters are the highest, but the followings will have decreasing heights.
Explanation: