Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column. Use each word only once. View Available Hint(s) ResetHelp 1. The of the Hubble Space Telescope is better for shorter (bluer) wavelengths of light than for longer (redder) wavelengths of light. 2. The large research observatories on Mauna Kea use giant . 3. separate the various colors of light, allowing astronomers to determine stellar composition and many other stellar properties. 4. The twin 10-m Keck telescopes can work together to obtain better angular resolution through a technique known as . 5. The Chandra X-ray observatory focuses X rays with mirrors. 6. A 10-meter telescope has a larger than a 4-meter telescope. 7. Galileo's telescope designs using lenses were examples of .

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

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.

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.