1 The Fission Theory: The Moon was once part of the Earth and somehow separated from the Earth early in the history of the Solar System. 2  The present Pacific Ocean basin is the most popular site for the part of the Earth from which the Moon came.
In our Tire Talk forum, some of our readers have questioned the interchangeability of P-metric and Metric tire size designations. But answering this question is like asking how to solve the national debt crisis. In other words, there are many answers, and some might be more practical solutions than others. There are two major size designations commonly used for passenger car tires, called P-metric and Metric sizing. If you see a âPâ in front of the tire size displayed on a tireâs sidewall it is a P-metric tire. If thereâs no P, itâs a Metric tire (also called Euro-metric or Hard-Metric).
Posted on. (Answer #2). The basic difference is that speed is a scalar quantity, and velocity is a vector quantity; basically, direction matters when talking about velocity, and it doesn't when we are talking about speed. Speed is how fast something is moving--the rate at which a distance is covered.ike this, if it is speed, you would just refer it to 2 m/s. If it is velocity, you refer it as this 2m/s east (with direction). So, average speed is the total distance taken over the total time taken (regardless of direction) while average velocity is the same whole thing, except it includes direction.