BE CAREFUL on this question: THINK When water evaporates, what happens to its molecules?
O Water always separates into Hydrogen and Oxygen in our atmosphere - this makes our
atmosphere very FLAMMABLE, because Hydrogen is a flammable gas.
The water undergoes a chemical reaction because it gets warm, and the Hydrogen and
Oxygen separate
O Nothing. water is a compound and the Hydrogen and oxygen are bonded. They just change
phase to a gas and stay a water molecule
O Some of the water molecules stay water molecules and some of them break bonds - acting
explosively - separating into hydrogen and oxygen.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm