The student creates a symmetric wave pulse traveling to the right on the same string. The amplitude of the second pulse is half the amplitude of the original pulse. Which pulse, if either, travels at a higher speed?

a. The higher amplitude pulse.
b. The lower amplitude pulse.
c. Neither, both pulses travel at he sane speed.

Briefly explain your answer.

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.

Most short-period comets do not have randomly oriented orbits because

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?