Physics, 28.06.2019 13:20 alkaline27
Stellar-sized black holes form when a star explodes in a supernova, leaving behind enough material that collapses to a distance within the black hole’s schwarzschild radius. as the core of the star collapses, its gravity becomes so strong that nothing—not even light—can escape from it. sort the following stars according to whether they could or could not collapse into black holes. could collapse into a black hole: could not collapse into a black hole: - the sun (1 solar mass) - eta carinae (100 solar masses) - spica a (11 solar masses) - betelgeuse (18 solar masses) - xi persei (40 solar masses) - sirius a (2 solar masses)
Answers: 2
Physics, 22.06.2019 16:00
Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.
Answers: 2
Physics, 22.06.2019 18:10
Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)
Answers: 1
Physics, 22.06.2019 21:20
Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.
Answers: 3
Physics, 23.06.2019 08:40
Which of the following has the greatest impact on an ecosystem migratory animals predation human inference
Answers: 1
Stellar-sized black holes form when a star explodes in a supernova, leaving behind enough material t...
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