A boat travels at 15 m/s in a direction 45° east of north for an hour about then turns and travels at 18 m/s in a direction 5° north of east for an hour

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

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.

How many times did thomas edison mess up the light bulb