7) A high-altitude balloon travels from an altitude of 18 km to an altitude of 30 km above sea level. On it's ascension, the temperature of the gas changes from - 62 °C to -38 °C. What
happened to the pressure of the gas inside the balloon as the balloon ascended? Explain in
terms of the frequency and force of collisions against the walls of the balloon.

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box