24 g copper is submerged in water in a graduated cylinder,
and the total volume increases by 2.7 ml. What is the density
of copper? (Your answer should only have 2 significant figures.)
g/cm

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.