How long will it take take light moving at 300,000 km/s to reach us from the sun? the sun is 15,000,000 km from earth.

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.

Ways that industry and agriculture use physical properties to separate substances

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?