W A diffraction grating of width 4.00 cm has been ruled
with 3 000 grooves/cm. (a) What is the resolving power of
this grating in the first three orders? (b) If two monochromatic waves incident on this grating have a mean
wavelength of 400 nm, what is their wavelength separation
if they are just resolved in the third order?

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)

Asher cycles 12 miles in 16 hours. what is his speed?

Hydrogen and helium are both members of?