The human brain is located in the upper portion of the head with a volume that could be approximated by a cube l=20 cm on a side. Brain cells,
consisting of 10% neurons and 90% glia vary in size with dimensions ranging
from a few microns to a metre or so. Taking d=10 microns as a typical
dimension and consider a cell to be a cube with each side having that length,
estimate the number of brain cells in the human brain.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =