13. The fuel tank of an airplane has a device that measures the fuel's temperature. Before the airplane took off, the temperature of the fuel was 27°C. After the airplane had been flying for one hour, the
temperature of the fuel had decreased to 3°C. Which of the following must have happened to the
molecules of the fuel?

answer; i do believe the correct answer is (river); /// good luck

no statements shown

the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.