What do we mean when we talk about the Milky Way in our sky?
A) the whitish patch of light we see when we look toward the center of the Milky Way Galaxy
B) the spiral-shaped galaxy in which we live
C) the patchy band of light that outlines the plane of the Milky Way Galaxy as seen from Earth
D) the bright stars of the constellations that lie along the ecliptic in our sky
C
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Velocity: A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?
A. 84 km/h B. 89 km/h C. 90 km/h D. 91 km/h
Rays with the shortest wavelengths have the
A) highest frequencies and energies. B) lowest frequencies and energies. C) lowest frequencies but highest energies.
The wavelength of a wave is
A) the distance between a peak of the wave and the next trough. B) the distance between two adjacent peaks of the wave. C) the distance between where the wave is emitted and where it is absorbed. D) how strong the wave is. E) equal to the speed of the wave times the wave's frequency.
Which one of the following is not a characteristic of a simple two-lens astronomical refracting telescope?
A) The angular size of the final image is larger than that of the object. B) The final image is virtual. C) The objective forms a virtual image. D) The final image is inverted.