Why did Hubble think the Cepheid variables he saw in "Fuzzy Patches" were outside the milky way?
A) They were dim. B) They were small.
C) They had a red shift character. D) Their brightness varied.
A
Environmental & Atmospheric Sciences
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Which set of Latin American nations were most successful in attracting European immigrants between 1870 and 1930?
A) Argentina, Chile and Uruguay B) Colombia, Venezuela and Ecuador C) Ecuador, Peru and Bolivia D) Costa Rica, Panama and Colombia E) Guatemala, El Salvador and Nicaragua
Environmental & Atmospheric Sciences
Which of the following is NOT a feature of a low gradient river?
a. floodplain b. levee c. alluvial fan d. oxbow lake e. point bar
Environmental & Atmospheric Sciences
thyroxine
What will be an ideal response?
Environmental & Atmospheric Sciences
What percent of Sub-Saharan Africans live on less than U.S. $2 a day?
A) 50% B) 46%. C) 84% D) 70% E) 64%
Environmental & Atmospheric Sciences