Suppose you lived at Earth's equator. Which of the following statements would not be true?
A) The north celestial pole is directly on your horizon, due north (with Polaris quite nearby).
B) The south celestial pole is directly on your horizon, due south.
C) Every day of the year, the Sun is above your horizon for 12 hours and below it for 12 hours.
D) The celestial equator goes through your sky from due east on your horizon, through 50° altitude in the south, to due west on the horizon.
E) No stars are circumpolar.
D
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Black holes with masses greater than a million solar masses explain the extremely rapidly moving stars and gas in the cores of galaxies
Indicate whether the statement is true or false
Time of flight (TOF) is routinely used to distinguish between different particle species. Calculate the difference in time interval required for a proton 
and a muon (rest mass: 106 
to travel 2.5m, if each have a momentum of 255 MeV/c.
A. 8 ns B. 15 ns C. 18 ns D. 10 ns
A spaceship, traveling at 0.100c away from a stationary space platform, launches a secondary rocket towards the station, with a speed of 0.560c relative to the spaceship. What is the speed of the secondary rocket relative to the space platform?
A) 0.460c B) 0.487c C) 0.492c D) 0.660c
A property of electromagnetic waves that makes them different than other kinds of waves such as sound or water waves is that
A. they do not require a medium to propagate through. B. they are transverse waves. C. their speed can change when moving in different media. D. they have many possible wavelengths.