Physics, 19.08.2021 22:10, shinyelish6
An astronaut travels to a star system 4.3 ly away at a speed of 0.90 c . Assume that the time needed to accelerate and decelerate is negligible.
A. How long does the journey take according to Mission Control on earth?
B. How long does the journey take according to the astronaut?
C. How much time elapses between the launch and the arrival of the first radio message from the astronaut saying that she has arrived?
Answers: 3
Physics, 21.06.2019 20:30, blessingjessica
Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.
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Physics, 21.06.2019 23:30, xxxamslashxxx9
If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)
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Physics, 22.06.2019 10:00, jeffffffff
**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z
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An astronaut travels to a star system 4.3 ly away at a speed of 0.90 c . Assume that the time needed...
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