Imagine a glass box that is completely sealed and in that box is a cactus in a small pot which statement is most accurate?
a. this is an open system because the light can go through the glass and get into the box
b. this is an open system because air is circulating inside the glass box
c. this is a closed system because nothing of substance and get in or out of the box
d. this is a closed system because of light enters through the glass box

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?