how long would it take a radio wave whose frequency is 7.25x 10^5 Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00x10^7 km

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.