Speed describes how fast an object moves. Speed is described by blank and time. Velocity is speed with blank. and time. Velocity is speed with blank .

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

In which situation can a mixture always be called a solution

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?