2) Describe how light is affected by (a) a transparent object
(b) an opaque object
(c) a translucent object

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

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.

What is the speed of an object at a given moment?