This photo shows the Large Magellanic Cloud, or LMC for short. Based on what you have learned in about the LMC from your text, which of the following statements about the LMC is not true?
A) Galaxies similar to the LMC are extremely rare.
B) It is an irregular galaxy.
C) It orbits the Milky Way Galaxy.
D) Its color indicates active star formation.
A) Galaxies similar to the LMC are extremely rare.
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If the universe is flat
a. its age will be equal to 1/H. b. its age will be equal two-thirds of 1/H. c. the density of the universe is less than the critical density. d. the density of the universe is greater than the critical density. e. dark matter accounts for a small fraction of the density of the universe.
A student walks 1.0 mi west and then 1.0 mile north, after ward how far is she from her starting point?
A 1.0 mi B 1.4 mi C 1.6 mi D 2.0 Mi
A charged particle (m = 5.0 g, q = ?70 ?C) moves horizontally at a constant speed of 30 km/s in a region where the free fall gravitational acceleration is 9.8 m/s2 downward, the electric field is 700 N/C upward, and the magnetic field is perpendicular to the velocity of the particle. What is the magnitude of the magnetic field in this region?
A. 47 mT B. zero C. 23 mT D. 35 mT E. 12 mT
What element is behaves as the oxidizing agent in the following equation and what element behaves as the reducing agent?
Sn2+ 2 Ag ? Sn + 2 Ag? A) The tin ion, Sn2, is the oxidizing agent while silver, Ag, is the reducing agent. B) The tin ion, Sn2+, is the reducing agent while silver, Ag, is the oxidizing agent. C) The tin, Sn, is the reducing agent while silver ion, Ag?, is the oxidizing agent. D) The tin, Sn, is the oxidizing agent while silver ion,Ag?, is the reducing agent.