Aprojectile of mass 100 kg is shot from the surface of earth by means of a very powerful cannon. if the projectile reaches a height of 65,000 m above earth's surface, what was the speed of the projectile when it left the cannon? (mass of earth 5.97x10^24 kg, radius of earth 6.37x10^6 m)

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?