Which model of the universe gives the youngest age for its present size and expansion rate?
A) a critical universe
B) an accelerating universe
C) a re-collapsing universe
D) a coasting universe
E) All models give the same age.
C
You might also like to view...
Which of these is the next evolutionary track for the Large Magellanic Cloud?
A) It will be free of our Local Group. B) contraction into a spiral C) collision with the Milky Way D) It will become a satellite galaxy of Andromeda. E) expansion into a giant elliptical
The quantum mechanical model of the hydrogen atom requires that if the orbital magnetic quantum number is 4, there will be how many permitted spin magnetic quantum numbers?
a. four c. three b. seven d. two
An experiment similar to the Miller-Urey Experiment was more recently done by NASA using an icy mixture of water, methanol, ammonia and carbon monoxide. The mixture was exposed to ultraviolet radiation
The results of this experiment were that no amino acids or DNA were formed, but complex organic molecules were observed. The purpose of this experiment was to determine whether: A) DNA could form from amino acids. B) DNA could form from ultraviolet radiation. C) ultraviolet radiation could create amino acids. D) amino acids could form in the harsh vacuum of outer space. E) amino acids cold form from water, methanol, ammonia and carbon monoxide.
For the following acid-base reaction, identify what compound is formed in the space marked
HNO3 + KOH ? ???? + H2O A) KNO3 B) H3ONO3 C) KOH2 D) KOH2NO3 E) none of the above