Acommando jumps from an aircraft and opens parachute dropping through a distance of 45.then he opens the parachute and decelarates at a rate of 2m/s^2 with a velocity of 2m/s. calculate the height from which he jumped from aircraft

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.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

At what time will the interfering waves have an amplitudeof zero?