The cosmological principle states that any observer in any galaxy will see the same general features of the universe
Indicate whether the statement is true or false
T
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The spectral classification of stars started with the amount of hydrogen present in their spectra, but a better method now uses the amount of oxygen in the star's spectra
a. True b. False Indicate whether the statement is true or false
Materials generally become warmer when light is
A) absorbed by them. B) reflected by them. C) transmitted by them. D) all of the above E) none of the above
If we place living cells in a nonpolar solvent like methane or ethane,
A) their membranes will thicken, preventing molecular transport across the membrane B) they will rapidly explode due to pressure caused by the solvent building up inside the cell C) their membranes will most likely dissolve as cell membranes are also nonpolar D) they will function in much the same way as they do in water
A metric ton (or tonne) is
a. the same as a British ton. b. not defined. c. a mass unit. d. a weight unit.