Arrange the following gases in order of increasing average molecular speed at 25 °C. a. He
b. O2
c. CO2
d. N2

Stage in which a star’s outer layers have started to cool and grow outward?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Adepositional also feature that forms where a stream enters a lake or an ocean is a