PLEASE HELP ASAP! WILL MARK BRAINLIEST What is the frequency of light that is at the peak of the suns radiation spectrum which carries an energy of 1.15 eV? Planck's constant is 6.634*10^-34 Js and the conversion factor from eV to J is 1.60*10^-19. Answer in scientific notation with 3 significant figures.

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?