1. What is the currently most accepted model for the Universe? 2. What is the evidence for the Big Bang?
3. What happened during the Big Bang?
4. What is this "anti-gravity"?
5. Why do we think that the expansion of the Universe is accelerating?
6. What is redshift?
7. How old is the Universe?
8. What is blueshift?
9. Where was center of Big Bang?

Ase your answer to this question on the information below.hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant.the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen.chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product.nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?