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.

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?