Updated on Aug. 5, 2016. Delta is redefining the products it offers customers to further distinguish the choices available to them. Delta will offer best-in-class options for each of its customer segments with innovative multi-cabin experiences. Customers will have five products to choose from, including Delta One, First Class and Delta Comfort+ which offer premium amenities. Main Cabin and Basic Economy service will offer value options with Delta's high standards of service.
Rating Newest Oldest. Best Answer: The can gets cold for the same reason that any other refrigeration unit gets cold. (eg air conditioner, refrigerator, dehumidifier). Inside of the can, there is a chemical which can be used as a refrigerant. It's a chemical with a low vapor pressure. When you press the button on top of the can, you open a valve and release some of the pressure from the can.
What is happening here? The compressed air, that was at high pressure, has moved (flowed in the the form of wind) to the atmosphere, which was at a lower air pressure. This is a key point. High pressure air will move into space of lower air pressure. This happens when the compressed air flows out of a syringe, when wind blows from high pressure weather systems to low pressure weather systems. What happens if you create a lower pressure area? If the students clamp the tube again, and this time try to pull the plunger out, they will realize that it gets difficult to pull the plunger out. This is because you are creating a vacuum, or a space of lower air pressure.