What is the main difference between physical changes and chemical changes

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

What causes most sediment to wash or fall into a river

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by