For example, an infrared pulsed 10 kilojoule laser made up of 50 pulses of 200 J each, spaced 10 microsecond apart can punch through steel easily from an actual significant distance.

But what about a LED with a similar output as this one? Could it cut through steel?

Let's say that I redirection the light, input the same amount of joules and pulses taking into consideration the loss of efficiency etc. Would that work?

Guys, does anybody know what software would be used to create this 3d model. BIM estimating software for construction. Any feedback would be greatly appreciated.

So I was recently wondering, what is the highest average speed of a person ever over a lifetime? This would include things like cars and planes. At first I thought someone like Alonso, Raikkonen, Sainz Sr, people who have spent a lifetime in motorsport but then theres astronauts in the space station that goes like 25,000+ kph. Just wondering other people's thoughts on this, I doubt there's a concrete answer.

As in, the entire state. With all of the ground, buildings, people, things, etc.

Yes, there are coilguns and they are the closest thing to a wireless power transfer, but the problem is that the coils need to precisely activated and disactivated in order to work with higher efficiency.
While railguns are just simple, brute power.

But there are wireless power transfer systems for railways and electric trains that uses something that looks like an open transformer or induction coils, but since railguns work with lorentz force, would it work if there was a solid metal piece between the power transmission parts?

I am sitting on an active Reddit account which holds around 1.8mio Karma with an age of around 15 years. If I would sell this account, how much can I expect?

Imagine if a Russian Sleeper agent planted in the U.S. in the 60's killed the President in the current year. If it was immediately determined that the guy was a sleeper from the Russian government of the 60's, and not the current administration, would that still be immediate grounds for war? This is all predicated on the hypothetical that it was proven to not be someone installed or awoken by the current Russian government.

Speed is measured relative to the surface of the earth.

I think the most that a lot of people achieve is on planes, around 1000kph. However, at least according to Being's CEO in 2017, only 20% of earth's population ever took a plane. For the rest I would guess their highest ever speed was achieved on a train, maybe a car? In both cases, maybe 150-200kph, landing us at at average value of ~350kph.

If we require that a major part of the person was exposed to air resistance, all of the above (except convertibles maybe) are excluded. Things that may set the recond for an individual person that come to my mind first are skydiving, rollercoasters, skiiing and (motor)cycling, but I'm not too sure what number I would put on this...

My 8 year old asked me this and I didn’t have a great answer but I guessed in Neighborhood of 5 billion ?

Looking at sales data (from a random google search) that seems low?

For the purpose of this question, fans are “personal electric cooling devices which work mainly by moving air.” So a ceiling fan would count, but a computer fan would not.

For better understanding of the context, I’ll explain the story—

I am 5’9”, roughly 160 lbs, 21 years old, am quite skinny, and have pretty decent strength; my girlfriend is about 5’2”, 225 lbs, 24 years old, and arguably has much more fat on her than me. Only thing I will note is that she does powerlifting and worked on farms growing up. Last week, we were just relaxing one evening and decided to get a few snacks and drinks, sit on the carpet in the living room, and throw on the TV. After a little while we started doing and saying little things back and forth to annoy and antagonize each other (note: we do this a lot as a couple and don’t usually mean any harm by it, we’re just having fun and we get along great) and at certain points we would even lightly poke and shove at one another, at one point even arguing who was stronger. (That’s the other thing, whenever we had these playful arguments, she often swore up and down that she was stronger than me, I wasn’t sure if she actually believed it and I definitely didn’t genuinely believe it😅, despite never really putting it to the test, just never thought too much of it) After our little back-and-forth game started to subside, I noticed her buttcrack slightly hanging out from her pajamas, and I’m not gonna lie.. I thought it would be funny to pour a little bit of my water in it😅 She immediately jumps, looks at me, laughs and says “Ok that’s it buddy”. She gets up on her knees, I get up on my knees, she starts pushing, I start doing the same, she starts advancing to me, I start advancing to her, and what at first seemed like the usual playful pushing, turns into us in a wrestling stance (again, we both knew that we were just having fun and games). After about 1 minute of us trying to get somewhere, I try working more into her upper body to get her closer to the floor and even tried lifting her thigh while pushing her shoulder to throw off her balance, none of which worked. (She’s smiling and making fun of me the whole time) When I tried going lower to try manipulating something, she then suddenly lifts my leg off the floor with no trouble, and does some kind of motion that had me on my back, her on top, and her arm completely clamping my neck. At this point I’m not willing to give up so I tried for minutes to break free and get up, but I just could not get myself to do it; I wasn’t sure how there was so much strength in her hold, I could not get her to budge at all. She then let me go and the second I tried getting up to continue my battle, she sits on me, traps my one arm under her thigh and holds my other arm down with her hand. Same thing, I tried for minutes to get lose and nothing would budge. She then said something like “I think you’re done, just accept that I beat you, I told you I’m stronger”. I then decided to call it quits. We had no personal issues result from it, we kissed, finished the movie and went to bed. I will admit I had a hard time accepting it at first but I got over it. Maybe we’ll have a rematch sometime😅

Anyways, I’m not saying it is a bad thing and I’m not badly affected by it; I actually think it was kind of impressive. I just am still trying to figure out if it’s really possible that she, being a chubbier woman could actually be more powerful than me, it just seemed surprising. Granted, I know she powerlifts, worked outside a lot, etc. but if she’s a woman with more fat than me, less cardio, probably less faster, how would she outperform me being a more fit, faster man? That’s all I have, please feel free to leave your thoughts and answers down below.

Let's say that the dent is deep enough to be clearly visible, and around fist size, maybe a little less. The panel is 2 inches thick. And only one punch. How much force would a person have to punch with to make this dent?

Which is low budget business in uae to make monthly 5-15 k

I've given up on bluebeam ever making an app for Android phones.

Can anyone recommend an app that I can use, not only to mark up PDFs, but where I can set a scale and make measurements?

Bonus points for snapping to vector lines especially with an spen, and the ability to make/import my own mark up tools.

Just a shower thought.

Asking as I know a family that had this happen and nobody has ever been able to articulate the numbers on how rare this is.

I have a brushless dc motor which has output power of 735W, voltage of 310 VDC and speed of 2500 r/min. How much do you think I can sell it for (second hand)?

Standard NBA hoop and ball. If 2024 were to come down to a dunk contest, who has a bigger roster to pick from and what is the headcount for each side?

Hypothetically, if I were to sell it, I'm just wondering how much it would fetch.

Supposedly, we can survive without food for a few weeks, we can survive without water for a few days, and without oxygen for a few minutes.

​

But how long do you all think someone would last jogging without stopping? To be more specific, here are a few parameters:

-average adult male

-initial 8 minute-mile pace

-can slightly lose speed over time (or not, if that makes estimation easier)

-no food or water during run

​

Personally my estimate would be a few hours, probably 3.

I'm sure it is much higher if the person has some running experience. What does everyone think?

What would the radius be to have 1 gee centrifugal with a rotation rate of 1 (sidereal) day?
Been musing having a ring structure around the earth which could be a foundation to construct solar power stations which can be left aimed at ground stations and have sucessions of geostationary communication, ground and weather monitoring installed.
But not swift with the math needed to calculate distance or know if this can be acheived with current material engineering for building an "Endless Suspension Bridge" around the Earth.

So let's say you are able to get a ton of pure co2, and extract the pure carbon from that. Would it just be a third of the weight, or something different? I googled it, and I couldn't find anything about the weight of carbon within co2, other than it being 1 atom's worth.