Avertical scale on a spring balance reads from 0 to 245 n . the scale has a length of 10.0 cm from the 0 to 245 n reading. a fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.55 hz . ignoring the mass of the spring, what is the mass m of the fish?

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

What is the radius of the circular path ofa charged particle in a magnetic field?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?