Physics, 10.03.2020 02:12 monnn91351
A Black Hole I? You’ve just discovered a new X-ray binary, which we will call Hyp-X1 ("Hyp" for hypothetical). The system Hyp-X1 contains a bright, B2 main-sequence star orbiting an unseen companion. The separation of the stars is estimated to be 20 million kilometers, and the orbital period of the visible star is 4 days. a. Use Newton’s version of Kepler’s third law to calculate the sum of the masses of the two stars in the system. (Hint: See Mathematical Insight 15.4.) Give your answer in both kilograms and solar masses (MSun = 2.0 * 1030 kg). b. Determine the mass of the unseen companion. Is it a neutron star or a black hole? Explain. (Hint: A B2 mainsequence star has a mass of about 10MSun.)
Answers: 3
Physics, 22.06.2019 06:30, jordanbyrd33
Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)
Answers: 1
Physics, 22.06.2019 08:20, cutechickens13
A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?
Answers: 3
A Black Hole I? You’ve just discovered a new X-ray binary, which we will call Hyp-X1 ("Hyp" for hypo...
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