The 15-kg roll of paper has a radius of gyration kA = 120 mm about an axis passing through point A. It is pin supported at both ends by two brackets AB. The roll rests on the floor, for which the coefficient of kinetic friction is μk = 0.2. A horizontal force F = 60 N is applied to the end of the paper. Determine the initial angular acceleration of the roll as the paper unrolls.

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

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Positrons are spontaneously emitted from the nuclei of