A race car is moving on a circular track with a radius of 50 kilometers. If the car's speed is 70 km/hr, determine the magnitude of the centripetal acceleration.
A. 3500 m/s^2
B. 1.4 m/s^2
C. 0.71 m/s^2
D. 98 m/s^2

The solid that is formed and usually sinks to the bottom of a solution is the

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?