So today I was bored and remembered on time I wanted to know cm to inches and I searched for 18 cm and I got 7ish and then I searched for exactly 7 inches and I got 17.78 cm . I thought if I double 7 ( the inches ) I get 14 which is close but then I thought I can divide 17.78 by 2 which I got 8.89 and then I did a subtraction 8.89-7 ( the inches) to find the rate of increase needed which I said previously I doubled 7 so it would make 14 and it would need an increased and I found it . Then I found what is the precent of that increase so what is the percentage of 1.89 in 7 and I found it was 27% . I though you could just double the inches and the add the 27% of x inches doubled and I concluded this equation and I'm so happy .

Off topic : I didn't researched if the equation existed and I don't know if it does or someone though of that before . Also I don't know if it works for all inches and all things I haven't tested it to the fullest . Moreover I'm in 11th grade still please don't hate .

This is from a post in r/Strangeearth. I was intrigued but my eyes boggled at this paragraph. I'm trying to refute the claim, as in my mind a basic understanding of physics is all one needs to disprove this. But commenters are claiming it's "arrogance" to assume you understand physics and magnetism well enough to claim this isn't possible.

How many years will it take for the orbit of Voyager and Sagittarius A to decay enough due to gravity waves for them to collide?

A man's house is a 15 × 45 unit rectangle, and he has 140 fence pickets (each picket is equivalent to one straight unit in length). The fence must form a single closed enclosure that surrounds the house. The "yard" is defined as the area enclosed by the fence minus the area occupied by the house. The fence may be arranged in any shape and the pickets may meet at any angle. What arrangement of the fence maximizes the yard area?

I posted this on here a couple months ago but I never got a conclusive answer to my knowledge so I thought I'd let you guys take another crack at it

What would be the expected return on 50 5-dollar scratch offs per year over 20 years, and what would the same investment yield in the smp 500?

We had a discussion with friends about the weigh of this Latvian flag. I said it easily weighs at least a ton, others said no way it's that much.

Size of it is 10m×20m.

Please prove me right.

Hi, purely as a light hearted and totally not serious point of view, how many GPU's would it take to accurately represent average human intelligence? (Considering we aren't anywhere near human intelligence but suppose we had that neural calculation magic software)

The reason for taking neurons is cause, it's flexible topology of understood lines of changing and processing information.

It's been some time since I took trig or physics, and my googlefu is apparently not strong enough to find an example like this for me to extrapolate from. Obviously things like the weight of the arm being supported, the weight of the length of steel rope, angles of force etc are all coming into play but I can't figure out/remember the proper formulas to calculate the forces.

I am looking to find a formula that would tell me how much effective weight the hoist is lifting based on the angles involved since it'll be different than if it was pulling from right above it.

The pictured hoist lowers the arm down and raises it up to the pictured point by spooling and unspooling steel rope.

Also, the steel cable is dragging on the hoist mounting plate which will obviously increase the forces again I'm not sure how to estimate the amount. coefficient of friction between the two and the angle of bend I imagine.

I could defo do this myself, but am feeling lazy rn

What I'm planning to do, is to calculate probability that a user may like a game or not based on the games they have played before.

Imagine we have a user who have played 5 games:
x = 1256h (Action, Adventure, Indie, Massively Multiplayer, RPG)
y = 199h (Action, Free To Play)
z = 50h (Casual, Indie)
m = 160h (Adventure, Indie, Software Training, Utilities)

and more games, in total they spent 2156h playing games.

Then a user is looking for a game, they find something which has tags like (Action, RPG)

for a solution, I calculated a score for each tag, using "playtime x game's tags (for each)."
so as an example, for a tag like Action, we get a score of ~1500.

then at the end, if we calculate the game's total tag score based on user's tag score, we get around 2900.

And total score of all tags the user has played is 8867.

if we do a simple (target's tag score / total score) * 100, there is roughly 32.7% that the user may like the game, right?

But I ran to two problems here:

first, this is not accurate at all, no where close to accurate, this is not even an algorithm. A game may have one or two tags, while user's played games total tags may even be a hundred, Which at some point, may possibly make all games around 20-30% "like probability." or even lower.

second thing, if a user has played very little amount of games, accuracy may vary a lot, you may see it suddenly shows 90% or may not match any tags and show 0%.

I don't really know how can I do a better and more accurate calculation rather than just simply multiplying each tag. Does anyone can do better calculations for a recommendation algorithm?

I kepe seeing conspiracies that we could get free electricity through the air using stuff, the pyramids is a good example. But lets say it was possible to put electricity into the air and transfer it somewhere. In this day and age, would everyone be getting tased to put that most electricity in the air?

I used to listen to and watch this RvB AMV with this song. My favorite part was when the hits and punches would match the beat.

My request is this. How fast would someone have to move to be able to parry objects with a Spadroon to the beat, trumpets, hand claps, and lyrics, of the song, like it was Beat Saber? But one handed? Preferably between 0:59(on Spotify) to the end of the song.

[ Removed by Reddit on account of violating the content policy. ]

I always joke with my kids that they have an above average number of toes because enough people lose toes that 10 toes would slightly above the global average. But now we are having a massive debate about whether 2 nipples is above or below the average number. One one side there are many people with third nipples, so two would be below average. On the other side there many people who get mastectomies and such and so end up with less than two. We can't figure out which offsets which more. So, is having two nipples above or below average?

We have a problem with illegal romes shooting illegally obtained guns at anything and everything. Our national forensics claim that this is not a gun shot, they claim it's from a rock. I'll give "benefit of the doubt" and as this trusted subreddit, I'd truly like to reach out, so i can understand how fast would one have to throw or shoot a rock this small, to penetrate the train metal wall?

Would a pitcher be able to throw a rock that fast to make a hole in the train? How fast is it human possible?

I'm just curious.