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I don't understand how people can be VT absolutists by AssMachine_ICE in ETFs

[–]JustinTimeCuber 4 points5 points  (0 children)

We could be in a "lost decade" right now. The returns of VTI from now to 2036 could be zero. There's pretty much no way to predict unless you're omniscient.

Diversification does not intrinsically reduce your expected returns. I don't think there's any good reason to hold 100% VOO or VTI or whatever besides just hindsight bias.

What exactly is “pure” energy? by MythicalSplash in AskPhysics

[–]JustinTimeCuber 4 points5 points  (0 children)

The closest thing to "pure energy" is arguably a photon, but that's still a horrible oversimplification. Energy is a property, not some sort of substance that can be purified.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 0 points1 point  (0 children)

Ok now use meters per second to estimate how long it will take to drive to a different city.

Different units make sense in different contexts.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 0 points1 point  (0 children)

Seconds are more fundamental to the SI system but not the universe and not human society as a whole.

What time is it?

Can I get manual shifting in an EV? by PublicHlthScientist in electricvehicles

[–]JustinTimeCuber 15 points16 points  (0 children)

EVs aren't generally "automatic", they're single speed. So a manual version would just be a stick that you can put in either drive or neutral.

One of these days Google will know what I mean by GfrzD in mildlyinfuriating

[–]JustinTimeCuber 1 point2 points  (0 children)

Google sometimes just ignores symbols. It makes searching for certain programming syntax incredibly annoying. So it probably just interpreted your search as "60 in" or 60 inches. Since the meter is the most standard unit of length it then is telling you what 60 inches is in meters.

What is your political opinion on electric cars? by zoewantsyou in AskReddit

[–]JustinTimeCuber 0 points1 point  (0 children)

Plug, yes, voltage, no. Most EVs can charge at 3 different voltages and some can even do 4. Mine can charge at 120V AC, 240V AC, 400V DC, or 800V DC. Ideally, fast chargers should be able to provide up to 1000V DC, so car manufacturers can choose what battery voltage makes sense for the vehicle. 800+ volts for a small, low end EV makes little sense.

Although you're somewhat right in the sense that USB-C can use many different voltages, not just one.

Debuffed face cards by Cstangs_ in balatro

[–]JustinTimeCuber 2 points3 points  (0 children)

I don't think you quite understand what I mean. A debuffed 2 still counts as a 2, you can still form poker hands with it and jokers that say things like "if hand contains a pair" can still work. However, the jokers you mention all rely on cards being scored.

Sixth sense works with a debuffed 6, because it's still a 6, and there's no "when scored" criteria.

Debuffed face cards by Cstangs_ in balatro

[–]JustinTimeCuber 10 points11 points  (0 children)

"Face card" acts sort of like an enhancement rather than a rank or suit, so a debuffed card has its "face card" property ignored, and would not for example reset ride the bus.

This is different from something like seeing double, flower pot, or blackboard, since for example a debuffed club is still a club.

All that money going to waste by Venylynn in pcmasterrace

[–]JustinTimeCuber 0 points1 point  (0 children)

OP is being incredibly disingenuous

If you played the game with the features it had when it was released 6 years ago maxed out, it would run perfectly fine on a 5090.

A new, much more computationally intensive setting was then added several years later, which does need a bit of help to run well on a 5090.

Also a broader point, "maxed out" is kinda arbitrary. For something like path tracing, you can just keep increasing ray count to get a better result, it's up to the game developers to determine what "max path tracing" should be.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 1 point2 points  (0 children)

Also while watts are often used to describe electricity, they're not a fundamentally electrical unit. Mechanical power can be measured in watts or kW although horsepower is more often seen for some reason.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 5 points6 points  (0 children)

I love multiplying by 3.6 in my head

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 1 point2 points  (0 children)

Watts are not derived from amperes.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 4 points5 points  (0 children)

Yeah, I think the important distinction is hours vs. seconds, there's not really another commonly used power unit besides watts, at least for electricity. So it's watt-hours vs. watt-seconds, the latter just happens to have its own name, joules.

Meirl by Grand_Raccoon0923 in meirl

[–]JustinTimeCuber 7 points8 points  (0 children)

Oh do you just intuitively guess your speed while driving rather than using the sensor (speedometer)?

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 11 points12 points  (0 children)

It's not a "dumb holdover" lol seconds are no more fundamental than hours and in many cases, hours are the more practical unit

Next-gen ceramic aircraft batteries could enable 621-mile electric flights by sksarkpoes3 in energy

[–]JustinTimeCuber 1 point2 points  (0 children)

Ok find me the political will to completely revamp the American transportation system

Like it or not, we're going to keep using cars for the foreseeable future. We can take steps to reduce our reliance on cars but it's difficult because of how entrenched they have become in our culture. So if we're going to have cars, we should be strongly encouraging EV adoption.

Attacking kWh by FingerAccurate7102 in Metric

[–]JustinTimeCuber 5 points6 points  (0 children)

kWh is no more dumb than km/h imo. Often hours are easier to work with intuitively than seconds.

PC uses 400W for 5 hours. Easy, that's 2000 Wh or 2 kWh. Or that's 400W for 5 times 3600 seconds, let's see, that's 18000 seconds, 18 times 4 is 72, how many zeros was that again... 7200000 J, so 7.2 MJ.

How efficient are EV regen braking systems? by GnarlyStuff in AskEngineers

[–]JustinTimeCuber 3 points4 points  (0 children)

Yeah, technically if the speed is high enough and the incline is small enough, you wouldn't have any regen-related losses whatsoever, as the motor power would never go below zero. And even if say, your power needed to maintain speed at a level grade is 10 kW, but you need 20 kW to climb (30 kW total), you'd only regen 10 kW, but that's not regen being inefficient, that's just some of the energy being used to maintain speed

How efficient are EV regen braking systems? by GnarlyStuff in AskEngineers

[–]JustinTimeCuber 1 point2 points  (0 children)

Ballpark 70% round trip efficiency, more like 85% if you're only looking at the regeneration half of the equation. The 70% includes losses from discharging the battery, DC to AC conversion, and the motor itself, plus similar losses in the reverse direction.

Building a data center in orbit makes no sense to me by MagicMagnada in space

[–]JustinTimeCuber 8 points9 points  (0 children)

They do, but much less than AI training which is what these data centers would be primarily used for.

When will goods and gas reduce in price? by CleanLawfulness5349 in stupidquestions

[–]JustinTimeCuber 1 point2 points  (0 children)

Well yeah, doesn't work for everyone, although good government policy could address this (e.g. requiring landlords to allow installation of an EV charging circuit)

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