Which can happen during a physical change? (2 points) select one: a. molecules can move more rapidly and freely and change states. b. the molecules in a substance break into smaller molecules. c. the molecules in a substance react with other molecules. d. the molecules in a substance are destroyed.

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) determine the magnitude and direction of projectile velocity at t= 1.3s b) determine the magnitude and direction of projectile acceleration at t=1.3s

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.

What are the north and south poles of a solenoid change with?