Why can someone in the United States almost always be able to observe the constellations such as Ursa Major, Cassiopeia, and Perseus?
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These constellations are considered circumpolar constellations. From mid-northern latitude, you see a number of familiar constellations circling Polaris and never dipping below the horizon. As Earth turns and the sky appears to rotate, the pointer stars at the front of the Big Dipper (Ursa Major) always point approximately toward Polaris.
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Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
A. 20° B. 60° C. 32° D. 64° E. 15°
Light of wavelength 550 nm in air is found to travel at 1.96 × 108 m/s in a certain liquid. Determine the wavelength of the light in the liquid
A) 550 nm B) 442 nm C) 359 nm D) 281 nm E) 303 nm
The condensation sequence suggests that ____________ should condense as solids closest to the Sun
a. hydrogen and helium b. metals and metal oxides c. silicates d. ices of water, methane, and ammonia
What are the common properties shared by most active galaxies and quasars? How do these properties lead to an understanding of the central engine?
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