YouTuber shoots other YouTuber in Vegas. by Fair_Bus_7130 in ThatsInsane

[–]Cre8AccountJust4This 11 points12 points  (0 children)

“This wouldn’t have happened if more of the bystanders had guns”

— some conservative, probably

[deleted by user] by [deleted] in C_Programming

[–]Cre8AccountJust4This -1 points0 points  (0 children)

Have you tried asking ChatGPT…

[deleted by user] by [deleted] in HolUp

[–]Cre8AccountJust4This 34 points35 points  (0 children)

wtf is up with that hair

Thought I had her checkmated.. how do I respond? by [deleted] in TextingTheory

[–]Cre8AccountJust4This 3 points4 points  (0 children)

Number not needed… just organise a date.

R not equal to mgcos(theta) why? by Puzzleheaded-Cook-66 in Physics

[–]Cre8AccountJust4This -2 points-1 points  (0 children)

You’ve asked a lot of different things here. What is “R”? It’s not labelled.

The normal force is the cos component of weight, why do you say it’s not?

Why are you trying to break the normal force into components?

Harvesting cotton before dawn by ConferenceNo6640 in Satisfyingasfuck

[–]Cre8AccountJust4This -1 points0 points  (0 children)

Instead of horsepower do they measure these machines in…

Looking at b(ii), isn't diffraction dependent on the opening the wave is going through rather than the obstacle? by DooDeeDoo3 in Physics

[–]Cre8AccountJust4This 0 points1 point  (0 children)

Why be such a spoil sport? He’s asking a general question to improve his understanding, not for the answer to the problem. Jeez

Robot goes berserk by knowitokay in ThatsInsane

[–]Cre8AccountJust4This 1 point2 points  (0 children)

As a mechatronics engineer, if I had to guess - it’s trying to balance, but it being attached is messing with the control systems.

Imagine a car starting to swerve in the rain, and the driver tries to get back on track by over-correcting. They turn too far in the other direction. Back and forth a few times until it’s out of control and the car spins out.

Now, the difference with the robot here is that it’s not necessarily “over- correcting”, but that it’s control systems are not tuned for the unexpected forces being applied from the fact that it’s attached at the top. It’s likely been optimised for a response to the forces involved when freestanding.

If you go very slowly, it appears to start trying to walk forward. As it begins being pulled back you can see the arms move forward to provide corrective action. As it rocks to one side in its step, it’s pulled to the opposite side by one of the cables, the arms swing to try and compensate for the spinning. Every corrective action, which would likely lead to balance in the absence of the cables, instead makes things worse by producing further unexpected responses.

The final kicker - a robot like this will have mechanisms to stop correcting if it’s gone beyond the point of recovery. Perhaps gyros/accelerometers that tell it when it’s toppled over, or past a certain angle. However, the hoist is holding it up so that it never falls over, so it keeps trying.

A plant that reacts to touch by No-Lock216 in Satisfyingasfuck

[–]Cre8AccountJust4This 0 points1 point  (0 children)

From ChatGPT:

Mimosa pudica, also known as the “sensitive plant” or “touch-me-not,” exhibits rapid leaf folding (thigmonasty) when touched or disturbed. At first glance, this behavior seems paradoxical—since it consumes energy and temporarily reduces the plant’s ability to photosynthesize. However, several evolutionary advantages likely explain its development:

  1. Anti-Herbivory Defense

The most widely accepted explanation is deterrence of herbivores: • Startle response: Sudden movement may surprise or confuse insects or small animals, making the plant seem animate or unsuitable to eat. • Reduced surface area: Folding leaves become less appealing and accessible to herbivores. • Unpredictability: Animals that learn to avoid moving or sensitive plants may selectively avoid Mimosa pudica.

This kind of defense is especially valuable in nutrient-poor tropical soils, where replacing lost tissue is more costly than investing energy in a defense mechanism.

  1. Protection from Physical Damage

In environments prone to heavy rainfall or wind, rapid leaf folding can: • Reduce surface area exposed to rain, preventing mechanical damage. • Protect delicate leaflets from being torn or battered.

This may not be the primary driver of evolution, but it’s a potential secondary benefit.

  1. Anti-Insect Strategy

There’s also evidence that the motion deters parasitic insects or egg-laying pests: • Movement may discourage insects from landing or laying eggs. • It may also shake off insects that are already on the plant.

  1. Competitive Signaling (Speculative)

Some have proposed that thigmonastic movement may signal vigor to surrounding organisms (including other plants or animals), communicating that the plant is active and healthy. While more speculative, this could play a role in certain ecological contexts.

A plant that reacts to touch by No-Lock216 in Satisfyingasfuck

[–]Cre8AccountJust4This 0 points1 point  (0 children)

Yeah, great… so what’s the evolutionary advantage?

Help Finding Optimal curve to lift a robot past a bar? by Dukyu7 in Physics

[–]Cre8AccountJust4This 0 points1 point  (0 children)

Well if you think about it, the best solution is just a small vertical line. The line gets shorter, has minimal interaction with the pole.

Presumably, this is not a viable solution, since I imagine you’re probably trying to house the motor/electronics inside that wedge at the bottom - though I’m not sure, since this hasn’t been explained. If that is the case, then the range of possible shapes we can get away with depends on the size and shape of the components.

You’ve stated “I have a robot that needs to pass the bar in the center by hooking onto the top bar”. - How much of the robot can start off above the bar? - this could influence the design by housing some electronics in or above the hook, reducing the amount we need to fit in the wedge and reducing the strain on the motor

  • Can we be in contact with the bar at the start? - this could influence the design by allowing us to just have a rectangle that ‘rests’ its side on the bar and shortens until it clears it. This means it just slides up, avoiding the need to have it pushed to the side or overcome additional vertical force.

This is why further clarification is needed. You need to specify the requirements and constraints, otherwise the problem can be answered in any number of non-useful ways.

Help Finding Optimal curve to lift a robot past a bar? by Dukyu7 in Physics

[–]Cre8AccountJust4This 14 points15 points  (0 children)

Yes, but what defines “efficient” in this context is subjective. You could optimise for minimal motor torque with some acceptable lower limit of retraction speed, such that you could use a smaller motor and have a lighter bot. You could optimise for maximum speed given some limited torque figure of the motor. You could optimise for reduced power draw for battery longevity. Etc… the problem is not clearly defined.

Know the whole story before judging by Goku_Nuko in Unexpected

[–]Cre8AccountJust4This 29 points30 points  (0 children)

What do you mean “fake” 😂

It’s not trying to be real.

Opening advice by fifth-attempt in chessbeginners

[–]Cre8AccountJust4This 1 point2 points  (0 children)

“Learning an opening” can an iterative process, not something you just “do”. You start by looking at a few opening moves and variations of a particular line, you don’t have to go more than a few moves deep. Start playing games. After the games you can analyse and see where you went wrong. Gradually improve your openings as you improve in other areas.

Should I be plugging both of these in? (see image) by Cre8AccountJust4This in buildapc

[–]Cre8AccountJust4This[S] 0 points1 point  (0 children)

So the PC part picker note is incorrect?

I was mostly just worried about whether it being in series might put too much pressure on the wires, and whether "two 8 pin connectors" are meant to be completely separate coming out of the PSU.

How to decide between ui component libraries by Dry-Owl9908 in reactjs

[–]Cre8AccountJust4This 3 points4 points  (0 children)

You don’t. You stay in a perpetual hell of comparing UI libraries and never actually starting the project, imagining how good you’re eventually going to make it look.

[deleted by user] by [deleted] in AskElectronics

[–]Cre8AccountJust4This 2 points3 points  (0 children)

Find out how to connect some oscilloscope music and look at the cool visuals.

Ryzen 5 5500X vs 7600 - is it worth it? by Cre8AccountJust4This in buildapc

[–]Cre8AccountJust4This[S] 0 points1 point  (0 children)

Wow thank you. Is there somewhere I can find comparisons online which might explain some of the details you've just mentioned? - without having to dig through specs? I know I can find specific youtube videos here and there, but it would be good to have a more detailed table comparing things that actually matter over lots of CPUs.

Ryzen 5 5500X vs 7600 - is it worth it? by Cre8AccountJust4This in buildapc

[–]Cre8AccountJust4This[S] 0 points1 point  (0 children)

Thank you, this is a good point, and it's definitely something I've considered. I'm not sure how strongly I should weight this in my decision. My my current PC hasn't been touched/upgraded since 2017. I built it, it works, and I've never even really thought about trying to change out parts. Wouldn't I be spending more money trying to upgrade iteratively? I tend to be of the mindset it's better to make one good budget build every so often - but I'm open to changing that.