Two cyclists start on a race between points a and d on two different routes. cyclist x takes the route passing through the equidistant points a-b-c-d, each separated by a distance of 200 meters. cyclist y takes the direct route ad, which has a total length of 546.41 meters. both cyclists reach the end point in 30 seconds. calculate the displacement and average velocities of cyclists x and y.

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

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.