In recent times I've been curious and yearning to be more energy efficient. I also know that continuously turning off and on electronics does exert more power than it saves. So, with that in mind, I was wondering what is the optimal time to turn on the light to be the most conservative in regards to power? Let's say I take leave my room for 5 minutes for every 25 minutes. In doing so, I turn off the lights for only 5 minutes. Would that be more efficient or would I have to wait longer to turn them back on?

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.