5kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1 to state 2. during this process the specific internal energy changes from u1=2709.9 kj/kg to u2=2659.6 kj/kg. during the process there is a heat transfer to the steam of magnitude 80 kj. also, the paddlewheel transfers 18.5 kj of energy to the steam by work. determine the energy transfer by work from the steam to the piston, in kj.

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?

How many electrons does each element require in its valence shell to become stable?

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.