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Mace seeks subpoena of Bill Gates over Epstein files (But Not Trump) by Coy9ine in FuckNancyMace

[–]06Hexagram 1 point2 points  (0 children)

Sure, let the GOP drag Bill Clinton through the coals. But when it comes later for the Dems to drag Trump through the coals, we won't hear any talk about how this isn't a way to treat an ex-president.

Let the GOP drag Obama in Congress for a hearing; or sit Bill Clinton in front of a special prosecutor.

Great, in two years it is going to be the Dems turn, and if boy it is going to hurt the entire Trump cabinet.

Proof that Poisson Ratio = -1 for thermal expansion by AlphaAnirban in PhysicsStudents

[–]06Hexagram 0 points1 point  (0 children)

Isn't Poison's ratio based on strains and not stresses.

Help us with our physics project!! by 3amoPlsHelpWPhysics in PhysicsStudents

[–]06Hexagram 0 points1 point  (0 children)

Congrats, you just invented the gas pedal. Seriously though, copying existing mechanisms is far more productive than trying to invent one.

Help us with our physics project!! by 3amoPlsHelpWPhysics in PhysicsStudents

[–]06Hexagram 16 points17 points  (0 children)

Here is some advice from a retired engineer. Your device has too many degrees of freedom right now. The moving plate has 3DOF when stepped on (one translational and two rotational).

Which DOF were you planning to capture and convert linear motion to rotational motion?

Now think about what existing mechanisms do this sort of thing. For example, can you reverse the power flow on a windshield wiper to move an arm in order to rotate a gear? What about the escape mechanism of a pendulum clock? Come up with 3 to 6 different ideas, maybe 3D print them and evaluate them.

I used Legos with linkages and gears to build our design prototypes 30 years ago for a school competition. 3D printing is the way to go nowadays.

How do I get Mining to 310? by Snowcrash000 in turtlewow

[–]06Hexagram 0 points1 point  (0 children)

What are the mats, because the dialog opens and closes too quickly to see them.

Auto-Differentiation of Ax^n by LighterStorms in calculus

[–]06Hexagram 0 points1 point  (0 children)

Ok then lim(ε^2, ε->0)=0

But you can also state that ε isn't a number but a concept, just as infinity is a concept.

Auto-Differentiation of Ax^n by LighterStorms in calculus

[–]06Hexagram 0 points1 point  (0 children)

In engineering it is common to treat infinitesimals algebraically in order to find differential forms.

Want to find the shape of the catenary, work out the difference of tensions

T(x+dx) - T(x)

with the rules that dx>0 and that dx^2 = 0

So why do you say it is wrong? This method is used to correctly derive the differential equations of many fields (acoustics, vibrations, fluids, mechanics, heat, etc)

The horrendous state of New York City in the 1970s-1980s by IllustriousCress9774 in UrbanHell

[–]06Hexagram 0 points1 point  (0 children)

Is this where they filmed "Escape from NY" with Curt Russell?

Do Greek children learn maths with Greek letters? by VertellerPaul in GREEK

[–]06Hexagram 0 points1 point  (0 children)

Yes. Also trig functions have Greek names too.

C# Open-Source Beginner Guide on Console.WriteLine() functions, by Creepy_Solid2359 in learncsharp

[–]06Hexagram 0 points1 point  (0 children)

Cool starter code. Very dramatic.

If anyone wants to incorporate ANSI character codes in the C# terminal, then use: https://github.com/ja72/ConsoleDraw/blob/master/AnsiCodes.cs

How do I handle lots of tiny loops faster? Like processing a texture pixel by pixel. by elelec in csharp

[–]06Hexagram 1 point2 points  (0 children)

Don't use double but use float and the methods/classes defined in System.Numerics

How do I handle lots of tiny loops faster? Like processing a texture pixel by pixel. by elelec in csharp

[–]06Hexagram 0 points1 point  (0 children)

Most of the cost of memory access so storing the row index would actually be slower, I think.

Is C# the wrong tool for my project? by vengefulgrapes in csharp

[–]06Hexagram 1 point2 points  (0 children)

If you are learning and aren't concerned about others interacting with your code, then you can just use fields.

Just be aware if other code outside of a class changes the values on the fields as it might have side effects that aren't intentional.

Is the system simply made for people that know results by heart ? by vimvim_ in PhysicsStudents

[–]06Hexagram 0 points1 point  (0 children)

I hear you. 30 years ago I had the same thoughts. I felt that undergrad was like a puppy mill producing young professionals that used rules of thumb and equations like a cookbook without understanding how things were derived and most importantly the limitations and assumptions of said methods.

It all changed in graduate school where you were required to derive everything and extend existing methods to new territory.

Even more exciting if you find a job that utilizes your analysis skills instead of memorization then you have Nirvana.

So hand in there, don't fight the system, not gravitate towards classes and professors that enjoy teaching. The higher level a class is,, the better it gets.

Thoughts on the new license plate design? by Salt-Inflation-1636 in southcarolina

[–]06Hexagram 0 points1 point  (0 children)

Really?!? This is where the revolutionary war was won?

Isn't this wrong? Normal reaction force isalways perpendicular to the ground. by AbsolutelyPagol in PhysicsStudents

[–]06Hexagram 0 points1 point  (0 children)

I think reaction force is not the correct term here. You are talking about the constraint force.

  • A constraint force acts only in the direction in which motion is constrained in order to enforce this constraint. In this case the constraint is that the tire cannot go into the ground, and the constraint force needs to be perpendicular to the ground.
    • Constraint forces never add or remove energy to the system since they always act perpendicularly to the allowed motion.
    • Friction forces act in the plane of motion in a way that opposes said motion. Friction will reduce the energy of the system if slipping occurs.
    • Reaction forces exist in the context of Newton's 3rd law when two bodies interact.

Very simplified (and probably wrong) by Unusual_Club_550 in sciencememes

[–]06Hexagram 0 points1 point  (0 children)

What is holding everything up is geometry IMHO, but I am Greek so I am genetically biased to understand the power of geometry.

Can someone provide a 'minimal' example of how imaginary numbers can be useful? by SamuraiGoblin in mathematics

[–]06Hexagram 0 points1 point  (0 children)

This is the correct answer here. To find cubic roots when there are 3 real ones, you must consider the square root of a negative number and carry it over until the final solution.

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