find the angle between two forces of magnitude 27N and 30N if the magnitude of the resultant of the two force is 8N

What is the mass of the same rock on the earth

The two required components for a generator

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