Physics, 19.02.2021 22:20 annemcnair217
What phenomenon was discovered by early astronomers and used by Hubble to confirm that the universe is expanding?
A. The light emitted by the galaxies becomes brighter as they move away from one another
.B. The light emitted by the galaxies becomes whiter as they move away from one another.
C. The wavelength of the light emitted by the galaxies shifts to the blue region of the spectrum as the galaxies move away from one another.
D. The wavelength of the light emitted by the galaxies shifts to the red region of the spectrum as the galaxies move away from one another.
Answers: 2
Physics, 22.06.2019 05:40
Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?
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Physics, 22.06.2019 06:00
The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.
Answers: 2
Physics, 22.06.2019 08:00
Which graph represents motion with an object with positive velocity that is located at a position of 3 meters at a time of 0 seconds? a) a b) bb eliminate c) c d) d
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Physics, 22.06.2019 12:30
When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)
Answers: 2
What phenomenon was discovered by early astronomers and used by Hubble to confirm that the universe...
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