(I know that similar questions have been asked before, but I would like to ask very specific questions about this specific image that I do not understand). Let's say that we have a wheel of a car that is initially stationary. In order for the wheel to spin, we need to apply a torque to the wheel...

This is a follow up question asked and answered (Radio-dating and the age of the earth) The answer was given that Zirconium is formed under high pressures and temperatures. How do we know, for example, most of the Zirconium on earth wasn't formed in some extraterrestrial event before the earth fo...