Auniform circular ring has charge q= 7.36 μc, and radius r = 3.33 cm. calculate the magnitude of the electric field at a distance of 4.20 cm along the axis of the ring.

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?