Open clusters and young stars are generally found only in the disk of the Milky Way and not in the halo
Indicate whether the statement is true or false
TRUE
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After a high-mass star explodes in a supernova, what is left behind?
A) always a white dwarf B) always a neutron star C) always a black hole D) almost always either a white dwarf or a neutron star E) almost always either a neutron star or a black hole
Given the equations below, which description best fits the physical situation?
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A. A projectile's displacement two seconds after being fired upward with a speed of 30.0 m/s. B. A projectile's displacement two seconds after being fired upward with a speed of 40.0 m/s. C. A projectile's displacement two seconds after being fired upward with a speed of 50.0 m/s. D. A projectile's displacement two seconds after being fired upward with a speed of 60.0 m/s. E. A projectile's displacement two seconds after being fired upward with a speed of 80.0 m/s.
Can anything go faster than light?
A) No, special relativity forbids it. B) No, general relativity forbids it. C) Yes, space can expand at faster then lightspeed. D) Yes, certain subatomic particles can move through space at faster than lightspeed. E) Superman can.
Clocks on fast-moving spaceship shizzing past Earth appear to run slow when viewed from
A) inside the spaceship. B) Earth. C) Both of these. D) Neither of these.