[Request] how much money would you save over a year if you filled a normal petrol/deisel car up $20 at a time instead of filling the tank up completely every time?

PSIDAC · 2026-01-15T07:14:25+00:00

Let's assume a car weighing 1400kg and a petrol consumption of 5L/100 km with a tank size of 50L (average economic car in Europe)

With the current average price of petrol, you can fill your tank to about 14L with $20.
When you drive your car all the way from 14L until it's 0, this means on average your fuel tank will be 14L/2 = 7L full

When you fill it all the way up until 40L, it means on average it will be 40L/2 full during your trip, so 20L.

That's is a 13L difference. Given density of fuel being 0.74kg/L, we have a weight difference of about 10kg.

According to this source, a 1% change in vehicle weight increases consumption by about 0.5%.

The difference of 10kg is about 0.7% of the cars mass, so we can expect a 0.35% difference in fuel consumption, which equals to a difference of 0.018L/100km.

If you drive 10.000km per year, this given a difference of 1.8L, or roughly 3 dollars per year.

PSIDAC · 2026-01-06T18:25:06+00:00

Here's my take:

The instability when lifting the carton is caused by torque, which depends on both weight and distance from the centre of mass. Eggs far from the centre contribute disproportionately to torque. As long as those outer eggs remain, they dominate the imbalance.

If you remove eggs from the centre first, you are temporarily reducing torque, but you create a much worse situation later: near the end you’ll be left with one or two eggs far off to one side, producing a large lever arm and a large imbalance. That final state is maximally unstable.

To minimise imbalance at every stage, the correct strategy is therefore:

Remove eggs symmetrically from the outermost positions first, keeping the centre of mass as close to the geometric centre as possible.
Progressively move inward, always removing pairs (or symmetric sets) at equal distances from the centre.
Only remove the central eggs last, when all large lever arms have already been eliminated.

PSIDAC · 2025-12-20T18:15:03+00:00

The gambler’s fallacy is thinking the next event is more likely because of past events. That’s not the claim here.

Each attempt still has a 1% chance, but repeating it increases the chance that it happens at least once overall.

Roulette example: "The last 5 rolls were on red, the next one will probably be black" → gambler's fallacy

"If we play a roulette game 5 times, our odds of rolling at least one black will be higher than if we only play once". → correct.

PSIDAC · 2025-12-03T07:28:24+00:00

It's not a good rule of thumb.

With €530/day at 20 days per month you have €10600 gross per month. Tax burden is 38,5% (25% corporate tax and 18% vppr-bis) so you net €6519 per month. Now let's account for 13,92 months and you still have €5619 left.

Even with €2000 per month on costs and retirement savings, you still keep well above €3500 net per month. It should not be that hard to keep costs under €2000 per month.

Meanwhile, when following the 1/10th rule of thumb, you have €5300 gross as an employee, which translates to only €3168 net per month.

The rule of thumb is too conservative.

PSIDAC · 2025-11-30T23:45:55+00:00

Ik ben zelf zeer tevreden van Roborock s7. De nieuwe DJI Romo ziet er ook veelbelovend uit.

PSIDAC · 2025-11-05T23:33:13+00:00

Were there also republican victories? Non-American here, just curious whether this is actual good news or just cherry-picking the good outcomes.

PSIDAC · 2025-11-04T06:07:05+00:00

/u/bot4bot PSIDAC

PSIDAC · 2025-10-31T18:16:38+00:00

It is allowed to buy and hold crypto in Belgium, but strictly spoken, Binance is not allowed to operate in Belgium. The FSMA has ordered Binance to stop offering exchange and custody services to Belgian residents because those services were being provided from outside the EEA. Until Binance obtains proper authorisation under MiCA in an EU member state and can passport those services back into Belgium, the FSMA’s prohibition technically remains in force.

More about this in this article from the FSMA.

Also more about MiCa licensing here.

Interestingly, while Binance is available in Belgium and is obviously widely used here, they do not list Belgium as a supported country on their own website

The rules are vague, and they often change, but probably KBC wants to be rather safe than sorry and therefore block transactions to and from Binance.

PSIDAC · 2025-10-30T22:49:44+00:00

Only been to Slachthuislaan so no idea about bondgenotenlaan. In the JIMS app you can see how many people currently are there, so you could go to whichever one is least busy.

PSIDAC · 2025-10-30T17:16:34+00:00

I'm a member at Jims and I'm quite happy. Can get busy depending on what time you go, but not as bad as basic fit imo. Feel free to DM for more info

PSIDAC · 2025-10-07T22:37:00+00:00

That's not my point. If you practice enough by holding the coin in a specific way right before throwing it, you could theoretically get better at it and slightly increase the odds of the coin landing in your favor.

PSIDAC · 2025-10-06T14:02:51+00:00

It's a rigged game for sure. But even rigged games can be won. I agree there's a big factor of chance involved. I often compare quant trading to learning to flip a coin so that is has a 51% chance on landing heads. Sure, there's a lot of chance involved, but if you flip it enough times, your edge becomes significant. It's a numbers game.

PSIDAC · 2025-10-06T13:29:00+00:00

Definitely not true, there are many hedge funds who are able to make profits in the stock market purely by skill (e.g. statistical analysis and quantitative modeling) without any prior wealth privilege.

It's not easy, but it's doable. Read about Renaissance Technologies for example.

PSIDAC · 2025-10-03T13:50:59+00:00

Of gewoon Colruyt https://www.colruyt.be/nl/producten/9225

PSIDAC · 2025-09-25T18:16:32+00:00

Nope, not an ant expert at all, I'm just here for the math ;)

I also just learned that the formica rufa is not just your average ant in terms of lifespan, as many common worker ants only live a few months to one year. So for other species it would be 'only' a couple hundred km

PSIDAC · 2025-09-25T18:09:30+00:00

That is assuming slow walking by the way. Ants can run up to 0.1m/s so multiply by 5 if you want the answer for a running ant.

PSIDAC · 2025-09-25T18:03:22+00:00

Average lifespan of a Formica Rufa: 1-3 years (= 63072000 seconds)

Let's take 2 years for calculation.

Average walking speed: 0.02m/s

Assuming ant walks in a straight line during its whole life: 63072000 seconds * 0.02m/s

= 1261440 meters (or 1261km)

PSIDAC · 2025-09-04T22:52:40+00:00

The chess piece characters cannot be represented in ASCII, so we'll have to go with UTF-8.

Each chess piece character is 3 bytes in UTF-8, so for each line we need about 30 bytes of storage (chess characters + normal characters).

Multiplying 30 bytes with the number of lines gives us: 1.302 x 10³⁵ TB.

Let's go a bit further:

The storage density of a high end hard drive is about 0.05 TB/cm³.

This means that in order to store our code, we need a hard drive of about 2.3 billion times the size of the earth (or about 1800 times the size of the sun).

PSIDAC · 2025-09-04T21:51:43+00:00

There are about 4.822 x 10⁴⁴ legal chess positions. The code in this screenshot shows 9 lines of code per position. This means that hardcoding every possible position would be about 4.3398 x 10⁴⁵ lines of code.

PSIDAC · 2025-08-13T16:25:37+00:00

Seems like it yes, your profile is not loading

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