if a runner exerts 350 j of work to make 125 w of power, then how long did it take the runner to do the work

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

If y gets smaller as x gets bigger and y have an relationship?

Ways that industry and agriculture use physical properties to separate substances