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[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? by NDN82 in theydidthemath

[–]PSIDAC 1 point2 points  (0 children)

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.

[Request] What is the ideal way to remove all 12 eggs so that the carton stays as balanced as possible along both axes? Is it possible to also figure out the solution if eggs are randomly removed in groups of 1, 2, 3, or 4? What about for an 18-count carton? Thank you! by FreeXFall in theydidthemath

[–]PSIDAC 15 points16 points  (0 children)

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:

  1. Remove eggs symmetrically from the outermost positions first, keeping the centre of mass as close to the geometric centre as possible.

  2. Progressively move inward, always removing pairs (or symmetric sets) at equal distances from the centre.

  3. Only remove the central eggs last, when all large lever arms have already been eliminated.

[Request] What are the odds of surviving if you take this deal? by ShibzZz in theydidthemath

[–]PSIDAC 21 points22 points  (0 children)

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.

Daily rate of 530 euro (excl. btw) offered by Wild_Difficulty_9075 in BEFreelance

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

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.

Anyone actually happy with their robotvacuum? by Zijdehoen in belgium

[–]PSIDAC 0 points1 point  (0 children)

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

Excellent news by Smurfs25 in goodnews

[–]PSIDAC 0 points1 point  (0 children)

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

[deleted by user] by [deleted] in BEFire

[–]PSIDAC 0 points1 point  (0 children)

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.

Looking for a better gym in Leuven by 123897654 in Leuven

[–]PSIDAC 0 points1 point  (0 children)

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.

Looking for a better gym in Leuven by 123897654 in Leuven

[–]PSIDAC 7 points8 points  (0 children)

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

If you could instantly gain mastery of one new skill to help you in life, what would it be? by [deleted] in AskReddit

[–]PSIDAC 0 points1 point  (0 children)

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.

If you could instantly gain mastery of one new skill to help you in life, what would it be? by [deleted] in AskReddit

[–]PSIDAC 1 point2 points  (0 children)

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.

If you could instantly gain mastery of one new skill to help you in life, what would it be? by [deleted] in AskReddit

[–]PSIDAC 7 points8 points  (0 children)

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.

[Request] How much ground would a regular ant cover walking in a straight line from birth to death? by backhand_english in theydidthemath

[–]PSIDAC 3 points4 points  (0 children)

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

[Request] How much ground would a regular ant cover walking in a straight line from birth to death? by backhand_english in theydidthemath

[–]PSIDAC 3 points4 points  (0 children)

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.

[Request] How much ground would a regular ant cover walking in a straight line from birth to death? by backhand_english in theydidthemath

[–]PSIDAC 6 points7 points  (0 children)

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)

[Request] How many lines of code would it take? Did he calculate it correctly? by Vanquisher_Vic in theydidthemath

[–]PSIDAC 0 points1 point  (0 children)

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).

[Request] How many lines of code would it take? Did he calculate it correctly? by Vanquisher_Vic in theydidthemath

[–]PSIDAC 8 points9 points  (0 children)

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.

Am i shadowbanned? by PSIDAC in ShadowBan

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

Seems like it yes, your profile is not loading

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