A metal bar is 2.60 m long at 21C. The bar is uniformly heated to a temperature of 28C. The change in length is measured at 7.0  106 m. What is the coefficient of linear expansion for the bar?

What is the role of the ocular lens?

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.

Explain what happens at the saturation point when adding salt to water at room temperature.