On your cousin's wedding day you leave for the church 30.0 min before the ceremony is to begin, which should leave plenty of time since the church is only 17.0 km away. On the way, however, you have to make an unanticipated stop because of road construction work. As a result your average speed for the first 15 min is only 11.0 km/h. What average speed do you need to have on the remainder of the trip to get you to the church on time? Express your answer to three significant figures and include the appropriate units.

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?