A6 kg object falls 10 m. the object is attached mechanically to a paddle-wheel which rotates as the object falls. the paddle-wheel is immersed in 600 g of water at 15°c. what is the maximum temperature that the water could be increased to? is this a very efficient way of heating water? the specific heat of water is 4.186 j/(g* ˚c).

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?