Physics, 21.08.2019 03:30 itsjoke5550
You are working in an observatory, taking data on electromagnetic radiation from neutron stars. you happen to be analyzing results from a neutron star similar to the one in the formation of a neutron star example, verifying that the period of a 13.0 km radius neutron star is indeed 3.3 s. you go through weeks of data showing the same period. suddenly, as you analyze the most recent data, you notice that the period has decreased to 2.6 s and remained at that level since that time. you ask your supervisor about this, who becomes excited and says that the neutron star must have undergone a glitch, which is a sudden shrinking of the radius of the star, resulting in a higher angular speed. as she runs to her computer to start writing a paper on the glitch, she calls back to you to calculate the new radius of the star (in km), assuming it has remained spherical. she is also talking about vortices and a superfluid core, but you don't understand those words.
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Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2
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4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
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Physics, 22.06.2019 18:30
Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.
Answers: 1
You are working in an observatory, taking data on electromagnetic radiation from neutron stars. you...
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