What is the difference between photoelectric effect and compton effect

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

Phase changes are chemical changes. true or false

If steel is more dense that lake water, why can a boat float