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Cosmology and Philosophy. One hundred years ago, many scientists believed that the universe was infinite and eternal, with no beginning and no end. When Einstein first developed his general theory of relativity, he found that it predicted that the universe should be either expanding or contracting, but not static. He felt so strongly in an eternal and unchanging universe that he modified his equations to eliminate evolution. When Hubble's results became accept, Einstein called the "fix" of his equations "My Greatest Blunder!" Why do you think Einstein, as well as other scientists of his generation, assumed that the universe had no beginning? You might want to think about the nature of evidence and drawing conclusions from it. You might want to think about the role of authority. Or you might want to consider philosophical impacts...or other aspects of the issue.
NOTE: We are not looking for a multi-page essay! In a concise paragraph, or at most two short paragraphs (typed), give your thoughtful answer as "a nugget of knowledge!"
The value of nD20 for a mixture can be approximatedas the weighted average of the refractive indices ofthe individual components. For a heptane/alpha-pinene mixture nD20 (mixture)=VheptanenD20 (heptane) + VpinenenD20 (pinene)
The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130J of heat. As it expands, it does 76kJ of work. What is the change in internal energy for the system?
The reaction of a ketone with R"NH2, and then with H2/Ni would yield?
Calculate the amounts of reactants requires to produce 21.8 grams methyl benzoate assuming an 80% yield.
A buffer solution is prepared by dissolving 0.35 mol of NaF in 1.00 L of 0.53 M HF. Which of the following is true about the chemicals in solution?
What are some possible sources of error in your calculated atomic weight for Mg? A. Calculate the % Absolute error. B. Calculate the % relative error in the mass, volume, temperature, and other measurements.
C5H5N, and 0.350 moles/l in pyridinium chloride, C5H5NHCl you are given a kb value of 1.7 x 10^-4 for pyridine find the ph of this solution using this kb value
Calculate the solubility of CuX (Ksp= [Cu2+][X2-]=1.27x10^-36) in a solution that is .200M in NaCN
Explain what is the final temperature of the block after the evaporation of the alcohol. Presume that the heat required for the vaporization of the alcohol comes merely from the aluminum block as well as that the alcohol vaporizes at 25.
Although that much is obvious, you take a quick look at the drug info app in your smartphone and find the chemical structure formula shown below.
What is the enthalpy change when a 4.0 gram sample of aluminum burns in excess of oxygen to form aluminum oxide?
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines.
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