A box has a volume of 55cm^3 and a density of 5G/cm. What is mass of the box?

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter