The boundary layer thickness is usually defined as the distance from the wall to the point where the flow velocity reaches 99 % of the free stream value.
In the very thin boundary layer associated with free stream flows with high Reynolds numbers, a steep rise in velocity occurs perpendicular to the wall.
Boundary layer thickness = 0.37*Distance on x-axis/(Reynolds Number^(1/5))
δ = 0.37*x/(Re^(1/5))
This formula uses 3 Variables:
Variables Used
Boundary layer thickness - (Measured in Meter) - Boundary layer thickness is the distance normal to the wall to a point where the flow velocity has essentially reached the 'asymptotic' velocity.
Distance on x-axis - (Measured in Meter) - Distance on x-axis is the distance of point measured along x-axis form origin.
Reynolds Number - The Reynolds number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.
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Answer:
A: Letter
and
C: Articles of Clothing
Explanation:
Primary Sources are immediate, first-hand accounts of a topic, from people who had a direct connection with it. Primary sources can include; Texts of laws and other original documents. Newspaper reports, by reporters who witnessed an event or who quote people who did.
Answer:
They're the birth place of Democracy.
Explanation:
Ancient Greece was considered as the first civilizations that introduced the concept of Democracy.
The building in Ancient Greece was designed to accommodate a lot of audiences facing one specific direction where the speaker can present his/her case. The Roman civilization adopted this building and some principles from Greek's democracy.
American leaders in the past used these concept as a replacement for British' monarchy. They found that mimicking the building can be a source of inspiration that remind them about the core foundation of democratic government.
Explanation:
<u>Philadelphia Convention.</u>
1. Tornado (Experienced)
2. Hurricane (Experienced)
3. Tsunami (Watched)
4. Earthquake (Watched)
5. Sandstorm (Watched)
1. Scared, worried. The winds were really fast, and my power had went out. I didn't wanna leave the bathroom ;-; The fact that tornadoes are scary is enough for me X_X
2. I felt slightly calmer, but still insecure. The reason is because here where I'm at, we have hurricane seasons a lot, so it's nothing new. But just knowing how dangerous they are and what they can do is somewhat scary.
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Hope I helped :>
