The assumption of homogeneity states that
a. the Universe looks the same at all epochs.
b. the Universe looks the same from all locations over sufficiently great distances.
c. the Universe looks the same in all directions over sufficiently great distances.
d. the Universe looks the same at all epochs, the Universe looks the same from all locations over sufficiently great distances, and the Universe looks the same in all directions over sufficiently great distances.
e. None of the other choices are correct.
b
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An 18 mm wide diffraction grating has rulings of 710 lines per mm. Light is incident normally on the grating. Monochromatic light of 506 nm wavelength is used. The largest angle from the normal at which an intensity maximum is formed is closest to:
A) 46° B) 44° C) 42° D) 40° E) 38°
Which layer of the atmosphere do you live in? What kinds of meteorological phenomena can be found in this layer??
Before it arrived in orbit about Eros, the NEAR spacecraft also flew past:
A) Venus. B) asteroid Mathilde. C) Comet Wild. D) Mars. E) Comet Halley.
A solenoid 4.0 cm in radius and 4.0 m in length has 8000 uniformly spaced turns and carries a current of 5.0 A. Consider a plane circular surface (radius = 2.0 cm) located at the center of the solenoid with its axis coincident with the axis of the solenoid. What is the magnetic flux through this surface? (1 Wb = 1 T ? m2)
A. 63 ?Wb B. 16 ?Wb C. 0.25 mWb D. 10 ?Wb E. 5.0 ?Wb