What does a mineral’s streak tell you, and how do you test for it?

What is the most useful equation for electric power?

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?