What was the name of the original supercontinent that Wegener proposed in his theory?

A Atlantis

B Gondwanaland

C Laurasia

D Pangaea

How would doubling the made of an object change the objects potential energy

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 are the similarities & differences between a thermistor and a light dependent resistor in physics?