Over which substance will the wooden box move most easily? Ο Α. Box Hay O B. Box Sand C. Box Oil O D. Box Pebbles​

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

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?

Is the number of complete movements of a wave per second.