PLEASE HELP A balloon with a charge of 5.0 x 10-5 C is held at a distance of 0.20 m from a second balloon having the same charge. Calculate the magnitude of the repulsive force.

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Asher cycles 12 miles in 16 hours. what is his speed?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.