The nucleus is complicated because many phenomena happen inside. You have to consider the numberer of particles, the distance between them and their energy. In general nucleus is strable when the electrostatic force is balanced by the nuclear force between the neutrons and the protons.
Answer:
The strength of the electromagnet increases.
Explanation:
I believe the appropriate answer is that at the interface the ray bends way from the normal.
When a ray enters a more dense substance or material (with higher refractive index) , it bends more towards the normal. The amount of bending depends on the change in speed such that is a substance causes the light to speed up or slow down more, it will refract more, and the other factor is the angle of incidence such that if the light is entering the substance at a greater angle, the amount of refraction will be more noticeable.
This is a trick question, isn't it? If a car is stuck in traffic, it doesn't matter how fast it can travel, because it isn't moving at all. Therefore the average speed would be zero, right?