Physics, 20.02.2020 20:30, queengenni
A star of mass 2.0 β 1029 kg that is 1.8 β 1020 m from the center of a galaxy revolves around that center once every 2.2 β 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the stars are distributed uniformly in a sphere about the galactic center, estimate the number of stars in the galaxy. (Do not round your answer to an order of magnitude.)
Answers: 1
Physics, 21.06.2019 21:00, myalee1419
To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit
Answers: 3
Physics, 22.06.2019 11:20, ashtonbillups
More solar radiation is absorbed by earthβs surface than by
Answers: 1
Physics, 22.06.2019 17:50, manou76
Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?
Answers: 1
A star of mass 2.0 β 1029 kg that is 1.8 β 1020 m from the center of a galaxy revolves around that c...
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