Which list of observations is the best evidence of only a chemical change occurring? A. new odor, smoke released, color change
B. new shape, drying out, texture change
C. new temperature, shorter length, state change
D. new volume, stretched out, color change

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

State the following: boyle's law and charle's law

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.