A ride at a park lifts people 30 m into the air, holds them at that height, and then drops them. What should be the reference point if you want to study the
motion of the people dropping?
O A. 10 m up
B. 20 m up
C. Ground level
O D. 30 m up

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Phosgene (carbonyl chloride), cocl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. phosgene can be produced by reacting carbon monoxide and chlorine gas at high temperatures: co(g) cl2(g)⇌cocl2(g) carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 477 ∘c . at equilibrium, the concentrations were measured and the following results obtained: gas partial pressure (atm) co 0.830 cl2 1.30 cocl2 0.220 what is the equilibrium constant, kp, of this reaction

Volume is a measurement of how fast particles of a substance are moving