Taking a nap in the afternoon makes people more focused for the rest of the day. What is the independent variable and the dependent variable?

Which characteristics can be used to differentiate star systems? check all that apply.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.

Which of the following words describe the reality that the universe looks the same from various perspective