Physics, 04.07.2019 07:30 khayes7400
Which concept was supported by taking measurements of the same stars at night and then again during solar eclipses? gravitational lensing principle of equivalence gravitational time dilation gravitational redshift
Answers: 1
Physics, 22.06.2019 15:20
Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60ยฐc while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.
Answers: 3
Physics, 22.06.2019 20:40
Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.
Answers: 1
Physics, 22.06.2019 23:00
Awelder using a tank of volume 7.50ร10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30ร10^5 pa and temperature of 37.1 โc. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 โc, the gauge pressure of the oxygen in the tank is 2.00ร10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.
Answers: 3
Physics, 22.06.2019 23:50
The star nearest to our sun is proxima centauri, at a distance of 4.3 light-years from the sun. how far away, in km, is proxima centauri from the sun?
Answers: 3
Which concept was supported by taking measurements of the same stars at night and then again during...
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