The magnitude of the electric field due to a disk of radius 3 m and a uniformly distributed positive charge is measured to be 150 N/C at a location in the air 6 mm from the center of the disk, along a line perpendicular to the disk. Approximately what is the magnitude of the electric field due to the disk at a location 9 mm from the center of the disk, on the same line?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential