Three positive charges q are placed at the vertices of an equilateral triangle. what should be the magnitude and the sign of a charge q, placed at the center of the triangle, so that every charge in the described configuration experiences zero net force?

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n