Which statement is the best description of the Milky Way galaxy? A. a group of planets revolving around a single star.
B. a collection of stars and gases with the sun as its center.
C. a collection of gases held together by inertia.
D. a group of stars, dust, and planets held together by gravity.

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes