Esuon 10 A steel rod is 20 m long and of cross sectional area of 0.30 cm2. If a weight of 5390
N is hung from the rod, determine the elongation of the rod, given that Young's
Modulus for steel is 20 x 1010 Pa.​

What happens to atoms and chemical bonds during a reaction?

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

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.