Physics, 11.03.2020 20:53 debramknoxx
An astronomer is studying galaxies of stars that are very far away and thus look extremely faint (using visible light). What kind of telescope should she and her graduate students apply for time on?
A. any telescope will show faint galaxies well; they should just use the one closest to their campus
B. a telescope with a small aperture but with eyepieces that have good magnification
C. a telescope built before 1948
D. the telescope with the biggest aperture possible
Answers: 3
Physics, 21.06.2019 20:30
Which statement best describes how private industry decides where to spend the money on research and development
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Physics, 22.06.2019 18:00
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
Physics, 22.06.2019 18:30
Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction
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An astronomer is studying galaxies of stars that are very far away and thus look extremely faint (us...
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