In a thermal expansion of water lab, a glass bottle of water is cooled to 0 degrees and the water level is observed as the temperature rises. there is a decrease in water level from 0 degrees to 4 degrees. then, at about 15 degrees when the bottle is placed in a warm bath (30 degrees), why is there another small and almost instant decrease in the water level when placed in the warm bath before it starts to rise again?

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

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.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional