PLZZ ASAP What is true about the electric and magnetif fields as the electromagnetic wave moves?

a The angle between them is constantly increasing

b They are perpendicular (90º)

c They are parallel

d the angle between them is decreasing

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

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.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell