Module 4- Real-World Physics Discussion

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Embry-Riddle Aeronautical University *

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102

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Aerospace Engineering

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Nov 24, 2024

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1 Hi class, For this week's topic, I chose to talk about pressure. My 1st impression of the idea of pressure went something like this, "pressure" yeah I know the concept, we use air to fill up the tires of our car, and the more air in it the more pressure it has. Well, folks I really only understood like 5% before I read about it. Turns out it's a lot more than just filling up tires, there are different types. By the definition straight from the book, it is "the force per unit area when the force acts perpendicular to a surface. The perpendicular component of a force acting on a surface divided by the area of the surface. P=F/A" (Ostdiek, 2018). In my own words, it's pretty much any type of force acting on an area. I did mention there are different kinds of pressure, it can come from a solid and fluid, then it can branch off to different types of principles like Bernoulli's principle. In the aviation world, we care about pressure in general, this is because things like pressure altitude help us understand how our aircraft is performing. This could be determining altitude or understanding our airspeeds. Then you get things like the density of the atmosphere. Here's a real example of why it's important to understand the concept of "Pressure" I'm going to talk about the weather for a little but bear with me. Have you ever been on final on a hot day and as you get closer to the ground you hit pockets of turbulence where it can throw off airspeed and altitude? I have, well turns out when you think about it in terms of pressure, the air is classified as fluid because the air is made up of different gasses. When the fluid gets hotter its atoms go crazy and want to expand, when the molecules begin to expand they will have the tendency to rise up. When the air rises up and hits an object that is the force you feel when you go through a thermal. I know I put it in very simple terms but it's a real-life thing that pilots should be aware off because it will help them adjust and compensate for the forces hitting an aircraft. Thermals will be more prevalent when you fly over objects like buildings or mountainous landscapes because it forces the molecules to rise higher affecting the forces you feel.
2 Aviation Weather. (n.d.). Thermal Soaring . https://www.aviationweather.ws/095_Thermal_Soaring.php References Ostdiek, V., & Bord, D. (2018). Inquiry into Physics. (8th ed.) Cengage Learning Inc. Aviation Weather. (n.d.). Thermal Soaring . https://www.aviationweather.ws/095_Thermal_Soaring.php
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