What is the numbeA driver started from origin and drove 5 km towards east, he then drove 3 km due west. His displacement is: r of significant figures in 4.07 × 1016?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

What was the first instrument to ever record an earthquake?