For reactor calculations it is very important to know the atom densities of all the isotopes in the reactor since each isotope reacts differently with neutrons a typical power reactor fuel is uranium enriched to about 4.95 w/o u-235. fuel in a reactor is typically uo2 with a density of 10.5 g/cm cubed. what is the atom density of u-235 in the fuel?

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation