Physics, 06.08.2019 05:10 sayedabdullah
What two things are needed to create an emission nebula? a) interstellar gas and dust b) hydrogen fusion and helium ionization c) cool stars and much interstellar dust d) hot stars and interstellar gas, particularly hydrogen e) hydrogen gas and carbon dust
Answers: 1
Physics, 22.06.2019 05:40
The difference between a red shift and a blue shift has to do with wavelength frequency. t or f
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Physics, 22.06.2019 16:50
Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
Answers: 2
Physics, 22.06.2019 20:00
Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.
Answers: 2
What two things are needed to create an emission nebula? a) interstellar gas and dust b) hydrogen f...
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