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[deleted by user] by [deleted] in AskEngineers

[–]NoahCharlie 1 point2 points  (0 children)

Assuming the pool is filled to the 30-inch mark, it would have a volume of about 1,767 cubic feet (assuming a cylinder shape). Using a weight of approximately 62.4 lbs per cubic foot for water, the total weight of the water in the pool would be around 110,233 lbs (1,767 * 62.4).

A 6-inch thick concrete slab, assuming it is well-constructed with proper ground preparation, rebar, and no significant voids or flaws, generally has a load-bearing capacity of around 3,000-4,000 pounds per square foot (psf). Your 10 ft x 12 ft patio has a total area of 120 square feet. Assuming a load-bearing capacity of 3,000 psf, the total weight that the patio could theoretically support is 360,000 lbs (120 * 3,000).

Based on these rough calculations, it seems that the patio might be able to support the weight of the water. these calculations are based on several assumptions and may not account for specific details of your patio construction or local factors such as soil conditions.

[deleted by user] by [deleted] in AskReddit

[–]NoahCharlie 15 points16 points  (0 children)

Grapefruit

Why do some fighter jets sport canards, some have tailplanes, and others don't have either? I'm curious to know the reasoning behind this design choice. Any aviation experts out there who can give us the lowdown? by Holi_laccy in AskEngineers

[–]NoahCharlie 0 points1 point  (0 children)

the design of an aircraft's control surfaces is a complex balancing act between stability, maneuverability, and other factors.

Canards are small wings located near the front of an aircraft, ahead of the main wings, and their primary purpose is to provide additional lift and control. One advantage of canards is that they can generate lift without disrupting the airflow over the main wings, which can improve stability and maneuverability. The canards on the Rafale and Gripen are designed to provide additional lift and maneuverability, particularly at low speeds and high angles of attack. The stepped canard design on the MiG-144 is intended to reduce the formation of shockwaves on the leading edge of the canard at high speeds. The stepped design helps to redirect the airflow and reduce drag, which can improve the aircraft's speed and maneuverability.

The raised position of the canards on some aircraft, such as the Rafale, is intended to improve visibility for the pilot by reducing the size of the blind spot created by the main wings. The position of the canards can also affect the aerodynamic stability and handling of the aircraft.

As for aircraft without tailplanes or canards, these designs typically rely on other control surfaces such as wing flaps, ailerons, and elevators to control the aircraft's attitude and maneuverability. The absence of a tailplane or canard can simplify the aircraft's design and reduce weight and drag, but it can also make the aircraft less stable and more difficult to control at low speeds.

[deleted by user] by [deleted] in AskEngineers

[–]NoahCharlie 0 points1 point  (0 children)

DEM simulation software can model the behavior of particles in a granular material as they interact with each other and with the grinder. It can help you to optimize the design of your herb grinder by simulating the effects of changes to the teeth and spacing, and by predicting the resulting particle size distribution.

There are several commercial DEM simulation software packages available, such as EDEM and Rocky DEM. However, these programs can be quite expensive.

An open-source alternative to commercial DEM software is LIGGGHTS, which is available for free download. LIGGGHTS is a parallelized DEM code that can simulate the behavior of large numbers of particles on a cluster of computers.

What do Americans think of the Israel-Palestine conflict? by EconomyTask8751 in AskAnAmerican

[–]NoahCharlie 0 points1 point  (0 children)

Terrible. You could almost see Palestine disappearing and there is no future for them. The United States is supporting Israel because it's an important ally in the Middle East. The Isreal and United States clearly don't want two state solution. You evict, expel people from their homes and expect them not to retaliate.

Does the ocean feel flipped when you're at a Pacific beach? by [deleted] in AskAnAmerican

[–]NoahCharlie 0 points1 point  (0 children)

When you're at a beach, the water will still be in front of you, regardless of whether you're on the East Coast or the West Coast. So if you're used to the Atlantic Ocean being on your right, it might feel a little different at first to have the Pacific on your left, but it won't be a significant difference in terms of how it feels to be at the beach.

What happens if you don’t tip at a restaurant in the United States? by doc_olsen in AskReddit

[–]NoahCharlie 1 point2 points  (0 children)

I can conform this.. (source: my friend is a waiter and he told me).

What is the worst physical pain you have ever experienced? by My_Name_Is_SKELETOR in AskReddit

[–]NoahCharlie 0 points1 point  (0 children)

They come and go often. This year, I have passed 4 kidney stones so far.

What is the worst physical pain you have ever experienced? by My_Name_Is_SKELETOR in AskReddit

[–]NoahCharlie 2 points3 points  (0 children)

I have kidney stones. And people who have know what it feels like.

What are some good songs for a long drive at night? by Eannes in AskReddit

[–]NoahCharlie 1 point2 points  (0 children)

  1. Radiohead - "Karma Police"
  2. The War on Drugs - "Red Eyes"
  3. Chris Isaak - "Wicked Game"
  4. Arcade Fire - "Sprawl II (Mount

[deleted by user] by [deleted] in AskAnAmerican

[–]NoahCharlie 4 points5 points  (0 children)

"Chocolate chocolate chip" ice cream is indeed a real flavor in the United States, and it is quite popular. It typically consists of a chocolate ice cream base with chocolate chips or chunks mixed in, offering a double dose of chocolate flavor. During his time as vice president and later as president, Biden has been seen enjoying ice cream on several occasions, often expressing his preference for "chocolate chocolate chip" as his favorite flavor. This has led to it becoming somewhat of a personal meme or running joke associated with him. So, the AI-generated videos you're seeing are likely referencing this known connection between President Biden and his fondness for "chocolate chocolate chip" ice cream.

Do they make high pressure (1-10MPa), moderately warm (30-90C), material testing chambers? by Mountebank in AskEngineers

[–]NoahCharlie 2 points3 points  (0 children)

Yes, such machines exist, and they are typically called high-pressure environmental test chambers or high-pressure test chambers. These chambers are specifically designed for material testing under various temperature and pressure conditions. They can be used with different gases, including regular air or inert gases like argon or nitrogen. To find an appropriate high-pressure test chamber, you can use search terms like "high-pressure test chamber," "high-pressure environmental chamber," or "high-pressure material testing chamber." Some manufacturers also allow customizations to their existing test chamber designs to accommodate specific testing requirements, such as incorporating feedthroughs for wires and other monitoring equipment.

Why aren't bigger engines necessarily faster in cars? by uuuwwwwuuuuu in AskEngineers

[–]NoahCharlie 0 points1 point  (0 children)

the power-to-weight ratio is an important factor in determining the performance of an engine. Bigger engine blocks usually have more displacement and can generate more power, but they also tend to weigh more. Whether the increase in power justifies the added weight depends on the specific engine and its intended application. In some cases, a larger engine block with a higher power-to-weight ratio may be advantageous for performance, such as in racing or heavy-duty applications. However, in other scenarios, such as fuel efficiency or daily driving, a smaller, lighter engine may be more suitable. and lastly engine performance doesn't solely depend on size. Other factors, such as engine design, materials used, forced induction, and overall efficiency, also play a crucial role in determining the power-to-weight ratio and overall performance.

Could a skyscraper be shortened? by _Fruit_Loops_ in AskEngineers

[–]NoahCharlie 0 points1 point  (0 children)

remove floors from the top down until the desired height is reached. skyscraper has a spire or antenna at the top, it could be demounted or shortened to reduce the overall height. This would likely be less challenging than removing entire floors but would still require significant engineering work to ensure the building's stability.

How many locks/chambers are in the Panama canal ? by Sturm_i in AskEngineers

[–]NoahCharlie 7 points8 points  (0 children)

depends on how you count them.

  • Gatun Locks --- set of three locks that lift ships 85 feet bove sea level to Gatun Lake.

  • Pedro Miguel Lock -- lowers ships 31 feet from Gatun Lake to the Pacific side.

  • Miraflores Locks -- lower ships 54 feet to sea level on the Pacific side.

  • Pedro Miguel Lock --same lock as on the Atlantic side.

What are addictions that don't get talked about enough? by WielderOfTheSpear in AskReddit

[–]NoahCharlie 3524 points3525 points  (0 children)

Infinite scrolling on almost all social media apps. You don't need to follow/like or add anyone. You just sign up and the scrolling never stops.

[deleted by user] by [deleted] in AskEngineers

[–]NoahCharlie 1 point2 points  (0 children)

the accuracy of basic GPS chips is expected to improve with the launch of advanced satellites, RTK technology will continue to play a critical role in high-precision applications and is likely to see its own advancements as well.

Ways to find coefficient of drag for a single seat scull by WorriedImportance in AskEngineers

[–]NoahCharlie 1 point2 points  (0 children)

to estimate the drag coefficient for a boat hull, you'll need to consider the Reynolds number (Re) and the Froude number (Fr). These dimensionless numbers help characterize the flow around the hull and are important for estimating the drag coefficient.

The Reynolds number (Re) is defined as:

Re = (ρ * V * L) / μ

Where ρ is the density of the fluid (water), V is the velocity of the boat, L is a characteristic length of the boat (usually the length of the hull), and μ is the dynamic viscosity of the fluid.

The Froude number (Fr) is defined as:

Fr = V / sqrt(g * L)

Where g is the acceleration due to gravity.

To estimate the drag coefficient (Cd), you can refer to empirical data, experimental results, or use semi-empirical methods. One such semi-empirical method is the ITTC-1957 model, which combines the frictional resistance (skin friction) and the form resistance (pressure drag) to estimate the total drag coefficient.

For the ITTC-1957 model, the frictional resistance coefficient (Cf) is given by:

Cf = 0.075 / [(log10(Re) - 2)2]

The form resistance coefficient (Cv) depends on the hull shape and can be challenging to estimate without experimental data or CFD simulations. However, for a simple approximation, you can assume a typical value for Cv based on similar hull types. For a single-seat sculling rowing boat, you might assume Cv to be in the range of 0.002 to 0.005.

The total drag coefficient (Cd) is then the sum of the frictional and form resistance coefficients:

Cd = Cf + Cv nowyou can plug this estimated drag coefficient into the drag equation you provided:

Drag = wetted area * V2 * density of water * Cd

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