Plz hurry the star betelgeuse is 20 times more massive than the sun. what would be the likely impact on the motion of earth if the sun were replaced by betelgeuse? a)orbital radius would increase because the gravitational pull would decrease. b)orbital radius would decrease because the gravitational pull would increase. c)orbital velocity would decrease because the gravitational pull would increase. d)orbital velocity would increase because the gravitational pull would decrease.

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.