Which statement is true of gases? a. gases have a definite shape. b. gases expand to fill all the space available. c. gas particles stay in fixed positions. d. gases have a definite volume.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

What quantity do units represent in value