Earth center theory (Ptolemaic) was wrong!!?

How did Galileo’s observations show that the Earth center theory (Ptolemaic) was wrong?

How did Venus and Earth end up with such radically different atmospheres and climates?

How did Venus and Earth end up with such radically different atmospheres and climates? What do the atmospheres have to do with geological processes, greenhouse gases and temperature?

what is the makeup of the solar nebula?

What is the makeup of the solar nebula and what did it have to do with the formation of the planets?

A force of 300 pounds compresses a 10-inch string to a length of 4 inches.

Please answer in detail. Thanks!! A force of 300 pounds compresses a 10-inch string to a length of 4 inches. 1) Calculate the work done in compressing the spring an additional 2 inches. 2) Calculate the work done in compressing the spring a total of 4 inches (from its natural length).