Consider the air in the entire system (syringe, rubber hose, rubber stopper and metal can). As the air in the system reaches thermal equilibrium with the cool water, describe how each of the following changes (if at all). Wherever possible, explain your answers in terms of changes to the individual molecules of air that produces the macroscopic changes. Volume: Pressure: Temperature: Number of air molecules: Internal energy of the gas:

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation