How does nuclear fission of Uranium - 234 result in electricity being generated?

Iknow #2 is d. i just need to know why

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Nan element’s square on the periodic table, the number with the greatest numerical value represents the