cynar

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cynar ,

The left is far less monolithic than the right. It was a sub-subset of the left, a percentage of feminists were/are anti male. Unfortunately, they were not called out for this, and so got very loud about it. This coloured the message from general left leaning sources.

Growing up, there was a lot of "men are bad/evil" and that we needed to make it up to women. A lot of this pressure came from left leaning sources.

Thankfully, I managed to avoid getting drawn into the right leaning backlash to this.

cynar ,

Can you point out which privilege he is losing (that everyone shouldn't have)?

cynar ,

It’s also worth noting that it also experiences zero distance. If you’re willing to tie your brain in knots, a photon doesn’t exist. Instead, space-time flexes so that 1 point touches another, momentarily. Energy is transferred, and space-time recoils back. That flex would be mathematically identical to a photon traversing the intervening space-time.

There’s a reason we use photons however. Such twisted space is effectively impossible for our brains to usefully comprehend.

cynar ,

A minor nit pick. It’s worth noting that increasing mass is an inaccurate view. It works in the simple examples, but can cause confusion down the line.

Instead, an additional term is introduced. This term, while it could be combined with the mass, is actually a vector, not a scalar. It has both value and direction, not just value. This turns your relativistic mass into a vector. Your mass changes, depending on the direction of the force acting on it! Keeping it as a separate vector can improve both calculations and comprehension, since comparable terms appear elsewhere (namely with time dilation and length contraction).

cynar ,

That’s why I said space-time, not just space. Generally worked with in the form of [X,Y,Z,iT] to make them all behave space like. Basically 2 4D positions become the same position. The fact that the 2 positions are displaced in time is almost incidental. The rules for the transformation however still have to collapse down to the same underlying measurements, so it’s a lot more complex than 2 arbitrarily points.

cynar ,

I’m fairly sure microwaves float in space. I don’t think there are completely different laws of physics, just for microwaves. A microwave in a bistro however…

cynar ,

If you want to get pedantic, as far as photons are concerned, photons don’t exist. At C time dilation hits infinity, while length contraction approaches zero. Therefore photons travel zero distance and experience zero time. Therefore, from a photon’s perspective, they don’t exist!

cynar ,

The combination of the infinite improbability drive leaking, and the SEP (somebody else’s problem) field is amazing. It provides an in-universe explanation for the various weird and unlikely things that happen.

cynar ,

I did a physics degree. The start is the sort of random stuff that would come up down the pub (in the evenings). I could easily see a conversation like this happening (at least the start).

cynar ,

A fairly common solution is military ammo boxes. They are designed to contain ammo cooking off, as well as protecting their content from fire. They therefore deal with battery fires fine. Just make sure there isn’t anything too flammable close to them, or above them. Any fire that happens will be directed upwards. Just line them with something not electrically conductive.

FYI, never put water on a battery fire. The water can react and make the fire worse. Instead use sand. It reduces flames and acts as a heat dump for the generated heat.

A good setup would be an ammo can for each large battery on a none flammable shelf (metal racking?), with nothing above it that can burn. A fire bucket of sand to hand, to control anything, and a smoke alarm will alert you to any issues as well. It’s overkill, most of the time, but good for peace of mind.

cynar ,

Part of the issue is compression. Most modern compression algorithms bias towards light areas of the picture. On high bandwidth streams, this is no issue. If the stream is highly compressed, the backs can become blocky and details are lost.

On top of this are suboptimal viewing conditions. Non HDR, background light, or poorly configured (or limited capability) screens. All of these punish the black parts of the image more than the bright.

ciferecaNinjo , (edited ) to Home Improvement

I need to come up with a right angle gearbox (example)

I’m not a blacksmith and local hardware stores are coming up empty apart from selling a right angle drill attachment (which would work but they’re a bit pricey for my purpose).

The purpose: to hide a water valve (positioned upright) & control it from the other side of a wall. (back story)

My ideas so far:

  1. find a broken angle grinder that someone threw away (seems unlikely) & cannabalize the gears
  2. build right angle gears out of wood
  3. harvest worn down bicycle cassettes from the trash and orient them at right angles against each other. They are designed to mate with a chain, so I’m not sure how well it would work. The valve is only turned on/off a couple times per year, so maybe I can get away with it.
  4. go to a toy store and find a kid’s Capsela set (do they still make these?); though I imagine it might exceed the cost of a right angle drill accessory anyway and it would possibly break under stress.

What other tools or appliances should I look for on a dumpster dive which would likely contain a right angle gearbox?

cynar , (edited )

After having a look at the use case, I would likely go with a modified project box, rather than your right angle gearbox idea. It sounds like you’re going to run into a world of pain, with some of the details.

You can buy project boxes of various descriptions that are waterproof. Some even have doors on them! If you took one of these, and cut a hole in the bottom or back (as appropriate) you could mount this over the valve. This could be sealed down and stsy in place. When you need to use the valve, you can either open the door if it has one, or remove the lid from the project box. This gives you access to the handle. Afterwards, close it back up, and the project box’s waterproof seal will keep the water out.

A couple of examples of what I mean.

Link 1

Link 2

Link 3

cynar ,

I’ve got a degree in the subject, and I still often feel the same way. Quantum mechanics works outside what our savannah running monkey brains can handle. The best we can do is trust the maths and approximate as best we can. We’ll regularly break those approximations however, and get thoughly flummoxed.

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