Identify the true statement. choose one:
a. constructive interference of comparably sized swells tends to cancel them out and produce smooth water.
b. wave base occurs at a depth equal to one-quarter of the prevailing wavelength in an area.
c. a particle of water in a wave moves in a circular motion when viewed in cross section.
d. the character of waves in open seas depends on the seawater depth.

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.