The equation of a progressive by y=0.02 sin2π/0.5 (320t - x) where x and y are in
meters and t is in second
find the
il amplitude
i frequency
wavelengths
velocity of the Progress in
waveم ا )​

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.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which sound characteristic is not affected by the relative motion of an object