Is cutting a sheet of paper in half a physical or chemical change

The pressure in a fluid is affected by which characteristics of that fluid

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.

Draw the structure for 5-isopropyl-2-methyl-3-nonene