Aparticle moves at a constant speed in a circular path with a radius of r=2.06 cm. if the particle makes four revolutions each t = 1 second, what is the magnitude of its acceleration?

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.

Avoltaic cell converts chemical energy to

Why do astronauts in the space shuttle weigh less?