You perform a double-slit experiment in order to measure the wavelength of the new laser that you received for your birthday. you set your slit spacing at 1.03 mm and place your screen 9.25 m from the slits. then you illuminate the slits with your new toy and find on the screen that the tenth bright fringe is 4.72 cm away from the central bright fringe (counted as the zeroth bright fringe). what is your laser\'s wavelength expressed in nanometers?

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

For which pair of objects would adding the same a

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good