Why are fossil fuels become a primary energy source?

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Which measure of an earthquake depends on how close you are to the focus?