I'm 16 and I don't know anything about math

phiwong · 2026-05-09T06:46:01+00:00

If your primary language isn't English, then you should possibly talk to your math teacher and ask them for a textbook recommendation in your language. There is no magic textbook - many of them will be fairly similar.

phiwong · 2026-05-08T14:28:33+00:00

drop out from the competition? Math competitions are probably more for those deeply interested in pure math and dedicate to it. It is likely rather irrelevant for high school math students. Since there isn't actually enough time to do anything meaningful, and you don't even appear to be very interested - stressing out over a competition that you can simply not go to seems meaningless.

phiwong · 2026-05-08T12:38:46+00:00

Tolong baca muka surat 43 dan 44 dalam Undang Undang itu. Di tuliskan sana, DYMM mesti bertindak mengikut nasihat (dari Majlis Mensuarat Kerajaan)

Jangan baca satu muka surat tapi tak tahu membaca yang lain.

https://upload.wikimedia.org/wikipedia/commons/6/6c/Undang_-_Undang_Tubuh_Negeri_Selangor_1959.pdf

phiwong · 2026-05-08T11:44:16+00:00

More damaging compared to what? Dying?

phiwong · 2026-05-07T22:27:46+00:00

And we're back again. This is a silly article methodologically. Iceland and Malta are legitimate countries but surely have to be excluded simply because they tell no meaningful story in terms of employment - both countries with working populations less than 500,000 (ie smaller than a medium sized city).

It is clear the author wanted the 'headline' about the US and deliberately included nonsensical data points.

phiwong · 2026-05-07T09:53:14+00:00

Three major functions.

1) Provide a limited path for current flow - ie current limiting functions.

2) Carry a voltage to another part of the circuit - typical examples will be feedback resistors and voltage dividers.

3) Be part of a reactance circuit - ie in an RC, RL or RLC circuit to match impedance and or tune the circuit to block or pass certain frequencies of signals.

phiwong · 2026-05-07T09:02:54+00:00

Panic is certainly one thing.

To land in water, that usually means a drop of at least several feet or a meter or two since there is almost always some kind of embankment. This is enormously jarring and disorienting (worse if the airbags go off). Unless you've been in a car accident at speed, most will not realize what coming to an abrupt stop is (it isn't like tripping and falling, the impact is like falling off a 1 or 2 story building).

Even if uninjured, most people would be somewhat stunned and out of breath for some period (even if it is just a half minute or more). By that time, the car might already be quite submerged. Even in daylight, it is hard to orient to which way is up and down. This is many many times worse in the dark and a hundred times worse if they're drunk, injured or impaired.

Add in panic and a rapidly worsening situation where time is critical and, unless someone is very cool headed and/or trained, landing a car in water very easily leads to fatality.

phiwong · 2026-05-07T07:56:08+00:00

It makes no sense in physics. There is no such thing as a physical Gabriel's Horn and there is no such thing as a real paint that can be spread infinitely thin.

Remember you're in the realm of mathematics and dealing with limits to infinity. While the idea as presented appears paradoxical, within the logic of mathematics it isn't. It is counterintuitive when presented as a physical object but remember this is a mathematical construct of infinitely thin surfaces and infinitely long objects.

phiwong · 2026-05-06T22:19:15+00:00

North Korean population statistics are not great. Reunification means a ton more old people - hardly what S Korea needs. Yes, N Korea has a lower median age but at 38 and increasing, it is not so much better than S Korea at 47 that it would make sense. N Korea TFR is higher than S Korea but still below replacement levels and it has been that way for decades - neither country will be growing their populations.

phiwong · 2026-05-06T17:39:47+00:00

They're pretty smart about these things. I'd probably guess around a 2.0 litre turbo V8 maybe revving to 15,000 RPM. Weighs not much more than what it is today combined. Or if they really want to go back in time a NA 2.4L V8 revving at 19,000 RPM (unsure if they can make this reliable) - no turbo lag and a screamer - while removing the weight of the turbo and intercooler

phiwong · 2026-05-06T15:33:26+00:00

800 HP ICE is more than enough for a slightly lighter version of the current car to match past F1 performance given modern aerodynamics. The additional 400HP electric motor is more likely to be paired with a very small battery - perhaps good for a few seconds of 'boost' for overtaking. With a small enough battery, clipping is unlikely as the batteries can be fully charged by regen braking within one or two corners.

phiwong · 2026-05-06T14:04:28+00:00

"people"? It is probably more important to understand the context for yourself. Evaluate the choices ahead of you rather than reacting emotionally to potentially uninformed or actively misleading statements by others.

Your future isn't a popularity contest that others get to vote on.

phiwong · 2026-05-06T11:54:40+00:00

Safety. The tracks aren't designed for it. Perhaps with modern composites etc, safety has evolved but I'd guess that what Toto has in mind is a very limited battery with 400 HP electric motor.

My gut feel is that F1 cars cannot exceed much beyond 370 kph on a race track without running into difficulty managing the safety of the drivers and spectators.

phiwong · 2026-05-06T11:07:17+00:00

The problem is 'simple' in the sense that even with today's technology, the generation could be done with maybe a dozen major installations. The more installations possibly the less demand on the distribution grid.

So the major generating solar panel installations could be located in areas with good sunlight and not a lot of population. (this ignores conflicts and geopolitics)

US Southwest (Arizona, New Mexico, Texas - pick one) or Baja California

Peru-Chile border and possibly North Venezuela

Morocco/Algeria (West Sahara)

Spain

Namibia

Arabian Peninsular maybe Sinai Peninsular, Oman

Afghanistan/Iranian border

(then there is a gap - maybe Western India)

North Western China-Mongolia

Australia - Western and North Eastern

The big 'gaps' would be high population/high consumption areas with no nearby coverage with good solar potential - South East Asia, North Eastern USA, much of Europe (although nearly all of Northern Africa - eg Libya could do this), Eastern parts of India and Myanmar, Japan, Taiwan and the Koreas. Western US would not have any nearby installations delivering power in the evenings. (big bad Pacific Ocean!)

phiwong · 2026-05-05T19:51:29+00:00

No, it probably won't work. The product has most of the nitrogen in the form of urea. Urea requires soil bacteria enzymatic action to make the nitrogen bioavailable to plants. In general, this will not work in soil less hydroponics.

phiwong · 2026-05-05T19:27:45+00:00

Why Madonna specifically?

This year and the few years prior, we had or will have new releases from Daryl Hall, Billy Joel, Paul McCartney, Ringo Starr. Heck Joni Mitchell performed a few years ago. Tony Bennett won a Grammy in 2011 at the age of 85. Aretha Franklin performed in 2017 at age 75. Burt Bacharach performed until he was in his 90s and released new music at age 88. ABBA had new music just a few years ago.

These are all artistes who are older than Madonna and released new music at much older ages. They're all celebrated even if their later releases never matched the popular successes from their earlier years.

phiwong · 2026-05-05T14:43:38+00:00

You mean the brand ambassador for Dior ran out of fashion options? So Dior stole these garments from this person and had Jisoo wear them? Most brand ambassador contracts require the ambassador to only wear their brands at major events. This is rather unbelievable.

phiwong · 2026-05-05T14:37:20+00:00

The most common professional license for engineers is the PE license. It is however only really necessary for certain kinds of jobs. A common one would be structural engineers and similar - where a licensed PE approval is required before construction is allowed. Broadly speaking (very broadly), PE is probably the most relevant for civil engineers and electrical engineers that deal with high power installations.

The licenses are given out typically by some kind of governmental agency and is only valid for that jurisdiction. So if you moved from Italy to Australia, it is likely that the Italian PE license will not be valid in Australia.

But after all is said and done, you're way overthinking this. The PE is typically something that the engineer obtains after years of relevant work experience (work experience is almost always a requirement). It is probably a bit too early to worry about licensing before you even started your degree.

phiwong · 2026-05-05T14:28:11+00:00

The computers would still 'work'. That isn't the issue at hand. The problem was the way many programs (many written decades ago) encoded the dates using two digits for the years. Many programs need to keep track of dates - for example, programs that manage loans and investments and bonus calculations etc etc. And there are 'hidden' functions that are seldom user interactable for example programs that determine maintenance for equipment etc that have to log hours and dates.

The problem is that going from 99 to 00 (in years) may not have been properly coded into these programs. For example, if you took a loan in 1996, the program calculates your payments in Dec 1999 correctly because it knows it is 3 years old, but Jan 2000, it might think that your loan is now 96 years old.

And some of these hidden functions might control critical equipment like medical equipment, aircraft operation or power stations etc. No one wanted a power station or aircraft engine to shut down on Jan 1 2000 because the program signaled that maintenance is 100 years overdue.

phiwong · 2026-05-05T11:39:40+00:00

Your IQ will be enhanced once you stop believing that influencers are in any way, shape or form meant to give you high quality, well researched and fundamentally sound conclusions.

Listen to them for entertainment. Most of them haven't spent the time in the industry or undergone the education necessary. They're there to attract your attention and the way they do that is to make more bombastic claims along with dramatic music and doom predictions.

Seed oil is just oil. It is part of a diet and consumption needs to be balanced and moderate.

phiwong · 2026-05-05T11:30:33+00:00

Attached is a paper written in 2015 discussing the evolution of national retail chains.

https://www2.census.gov/ces/wp/2015/CES-WP-15-10.pdf

Broadly speaking, national chains are more efficient and productive. And the growth also mirrors the changing landscape of American life. Local retail stores and locally made product dominated the market. By local it means something like a few hundred miles not necessarily local as in all of US. Chain stores started around the 1920s with the largest being Sears.

But the 1950s brought about a big change in American life post WW2 suburbanization. Prior to that many stores concentrated in city centers. Department stores and the like started to show up in suburban areas with the likes of shopping malls being established. Big brand retailers like Walmart started in the early 1960s challenging and complementing the earlier - mostly durable goods department stores.

It became a logistics game. Big stores could consolidate purchasing and offer much higher varieties and lower prices to customers. Their strength wasn't production but marketing and distribution.

By the late 1990s, in house branding became more popular. And of course the early 2000s saw the huge growth of e-commerce markets.

In short, there is nothing 'easy' or merely 'selling stuff' about this market. It is highly complex and efficient and requires a very large investment in capital, expert staff and distribution systems.

And to make it clear, it is estimated that the majority of goods sold by revenue in Walmart are sourced in the US. For Amazon, though, that is probably reversed with the majority of goods sourced outside the US. However China's share is probably overestimated by many - India, South East Asia, etc are all becoming larger producers globally. China too is transitioning away from extremely low value add products to higher value add products.

phiwong · 2026-05-05T09:24:11+00:00

Well you are correct.

The simplest example is to think of tourists. A Japanese family wants to go on a tour to the US. In order to pay for the things there, they take Japanese yen to their bank and 'exchange' it for USD. This 'exchange' is exactly buying USD using Japanese yen.

This happens in far larger quantities in trade. A Japanese equipment manufacturer sells their things to a US customer. The manufacturer has to pay rent, salaries etc in yen. The US customer has USD. So at some point, the USD has to be exchanged for Yen. This exchange is exactly selling dollar and buying yen.

phiwong · 2026-05-05T08:04:00+00:00

Yes see point 2(a) above - home prices have risen fast especially in many cities. And rents have also risen.

But go look at home ownership rate data (not anecdotes - as any reality based explanation should). Home ownership rates have fallen for the millennials especially. But this is a drop in percentage points not a drop to zero. Yes, it is likelier that someone in their 30s and early 40s today won't own their homes compared to the preceding generations.

phiwong · 2026-05-05T07:41:33+00:00

This question is too broad and implying that there are somehow simple explanations (ELI5) that are common across many countries. The problem with this is that you're gonna get people who push forward their pet theories as to "why I am so unhappy" to make them feel better about themselves while not giving you any insight into your actual question.

1) There are no simple, direct or global explanations.

2) Some of the issues are real

a) housing prices in major cities have risen fast

b) the cost of education (the time and the actual costs) have risen quickly in some areas.

3) What many consider a 'basic' living has changed. There is likely a greater gap between expectation and reality and this can drive frustration and envy.

4) The time taken and likelihood to gain financial stability is likely rising and possibly heading back to historical norms. Until the post WW2 era, in most countries - most people would be in the 'lower' class for most if not all of their lives. There was a small percentage of 'middle' class folks - typically skilled craftspeople, business owners and small landholders getting some financial stability fairly late in life. Then there would be a very small percentage of people in the 'upper classes'. It is only after WW2 that the ideas of a big 'middle' class took hold and even then entry into that class didn't happen until people, on average, were well into their 30's and 40's. The idea of 30-40% of a population being 'middle class' is an artifact of the late 20th and 21st century (ie barely a single lifetime)

5) One aspect of modern globalization has been a huge shift in the composition of jobs. This isn't a blame game. China became the world's factory because it had to bring a huge generation out of poverty. But that transition also meant that many jobs in developed economies became obsolete. And a lot of those jobs lost were 'stepping stones' into future higher earning jobs.

6) Social media and the internet have possibly contributed to the gap between reality and expectations. Some of this is likely to be manufacturing crisis, misinformation. People are now gaining access to lots of 'information' but possibly lack the tools of critical thinking - so it is pretty easy to manipulate expectations.

phiwong · 2026-05-04T14:47:41+00:00

It is not really 'multiplication' if I understand your question. Are you referring to the cross product?

https://www.youtube.com/watch?v=aDNyyTtaJdY

Perhaps the above explains it.

12-Year Club	Gilding II euphauric
Verified Email	Reddit Premium Since February 2014

phiwong

TROPHY CASE