Physics, 26.08.2019 23:30 andrewlawton8125
Spiral galaxy rotation curves are generally fairly flat out to large distances. suppose that spiral galaxies did not contain dark matter. how would their rotation curves be different? (a) the orbital speeds would fall off sharply with increasing distance from the galactic center.(b) the rotation curve would be a straight, upward sloping diagonal line, like the rotation curve of a merry-go-round.(c) the orbital speeds would rise upward with increasing distance from the galactic center, rather than remaining approximately constant.(d) the rotation curve would look the same with or without the presence of dark matter.
Answers: 3
Physics, 22.06.2019 10:40
Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
Answers: 1
Physics, 22.06.2019 11:30
With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90
Answers: 1
Physics, 22.06.2019 11:50
The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e
Answers: 1
Spiral galaxy rotation curves are generally fairly flat out to large distances. suppose that spiral...
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