Aray of red light, for which n=1.54, and a ray of violet light, for which n=1.59, travel through a piece of glass. they meet right at the boundary between the glass and the air, and emerge into the air as one ray with an angle of refraction of 22.5∘. part a what is the angle between the two rays in the glass?

What is work? how much work is done to move an object 0 meters?

When an object is heated it contracts. a. true b. false

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.