The velocity of a body is given by the equation v=a+bx, where 'x' is displacement. The unit of b is ​

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

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.