If you plug in -2 then you can figure out by calculating
The answer is a shift from human and animal energy to energy from other sources.
I would say that the sectional tensions strengthened during the 1850s mostly because of slavery. As you already know, historically, the North and the South of US were very different. The North went out of its way to abolish slavery, whereas the South was pro-slavery. This is what created many tensions, and later on, even more wars between these two sections.
The question is incomplete but i will try to answer it to the best of my ability.
Answer:
See explanation
Explanation:
A nuclear power plant operates by a chain reaction. A nuclear power plant usually uses a uranium fuel. The fissile isotope of uranium is U-235.
This reaction is a chain reaction in the sense that the neutrons produced bombard more uranium atoms leading to a self-sustained chain reaction. Control rods and moderators are used to keep the chain reaction under control.
The equation of the chain reaction is depicted in the image attached to this answer.