PET scans involve the use of positron-emitting isotopes like carbon-11 and fluorine-18. These isotopes can be produced at hospital-based accelerators that first accelerate deuterons (hydrogen-2 nuclei) and then direct the deuterons onto a solid or gaseous target. Suppose a deuteron (rest energy 1875.6 MeV) is accelerated to a kinetic energy of 2.50 MeV. What is its speed in meters per second?