You need to start by figuring out the physics of a hovercraft's lift.Aki said:I'm building a hovercraft, and I am using an old computer fan to blow air into a plastic garbage bag and fill it up. I need to poke a few holes on the bottom of the garbage bag to let the air out, and I want to have a less friction as possible. What size should the holes be? And how many?
Air pressure is the force exerted by the weight of air molecules in a particular area. It is important because it affects weather patterns, helps with the functioning of many machines, and is necessary for living organisms to survive.
Air pressure is typically measured using a barometer, which can be either an aneroid or a mercury barometer. The most common unit of measurement for air pressure is the pascal (Pa), but other units such as atmospheres (atm) and millibars (mb) are also used.
The main factors that affect air pressure are temperature, humidity, and altitude. As temperature increases, air molecules move faster and spread out, resulting in lower air pressure. Humidity can also affect air pressure as water vapor is less dense than dry air. Lastly, air pressure decreases with altitude because there are fewer air molecules at higher altitudes.
Air pressure is closely related to weather patterns. High air pressure typically indicates clear and sunny weather, while low air pressure is associated with cloudy and stormy weather. Changes in air pressure can also help meteorologists predict changes in weather patterns.
Understanding air pressure is important in many industries, such as aviation, meteorology, and scuba diving. It is also crucial for everyday activities like cooking, where changes in air pressure can affect the boiling point of water. In addition, air pressure is essential for the functioning of many machines, such as car engines and HVAC systems.