Polaris has always been the star nearest the north celestial pole
Indicate whether the statement is true or false
F
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How did the four-stage history of Mars differ from that of Earth?
What will be an ideal response?
At t = 0, a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction. Its acceleration is given by 
m/s2. At the instant the particle reaches its maximum y coordinate how far is the particle from the origin?
A. 11 m B. 16 m C. 22 m D. 29 m E. 19 m
Sound is a(n)
a. longitudinal wave. b. electromagnetic wave. c. transverse wave. d. standing wave.
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 486.1 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 485.9 nm
What can we conclude? A) The star is moving toward us. B) The star is moving away from us. C) The star is getting hotter. D) The star is getting colder. E) The "star" actually is a planet.