Energy to support an origin of life in a Europan ocean would probably come from
A) deep-sea volcanic vents
B) sunlight filtering through the ice
C) meteoroid impacts on the surface
D) heat generated from Jupiter's magnetic field
A
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Star A and star B both have an apparent magnitude of 7.0, but star A is at a distance of 15 pc and star B is at a distance of 30 pc. Which statement below is correct?
A) Star A appears brighter than star B, but star B and star A have the same intrinsic brightness. B) Star B appears brighter than star A, but star B and star A have the same intrinsic brightness. C) Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A. D) Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B. E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.
A disk and a hoop of the same mass and radius are released at the same time at the top of an inclined plane. Which object reaches the bottom of the incline first?
A) The hoop B) The disk C) Both reach the bottom at the same time. D) It depends on the angle of inclination. E) It depends on the length of the inclined surface.
Which of the above illustrations shows a basic aqueous solution?
A) A B) B C) C D) All of the above are neutral solutions. E) none of the above
Buoyancy: A 50-cm3 block of wood is floating on water, and a 50-cm3 chunk of iron is totally submerged in the water. Which one has the greater buoyant force on it?
A. the wood B. the iron C. Both have the same buoyant force. D. It cannot be determined without knowing their densities.