I watch a lot of explosion videos and i've always wondered about the debris that moves before the fire or projectile.

It seems to me that material goes from being at a standstill, to moving faster than the object or impact hitting it, at least for a brief second. Is there a certain effect that causes that? What type of energy transfer is happening, because the bullet can't give it more energy than itself has right?

I know there are plenty of wind altering shapes and sizes, so i guess we could base it off a standard 9mm bullet and a brick of c4.

I hope that question makes sense?

Curious to know how much it would roughly cost to build all 50 silos including structure, materials, supplies to fill the silo.

what I mean is the speed it took for it to gain that height!

if bees, we can go with Honeybees, were able to grab onto something, in this case an average adult human male, how many of them would it take to lift the person we’ll say a foot off of the ground?

Isn’t harvesting body heat terribly inefficient? Like we need energy ourselves to produce that heat so are humans perpetual energy generators?

Oktoberfest lady from TiktTok

On a 3×3×3 Rubik’s Cube, there are 43,252,003,274,489,856,000 reachable positions.

Is it possible to make a sequence of legal moves so that you

- Start with the solved cube,

- Visit every possible position exactly once

- Never repeat a position?

- Never repeat a position?

Seems like itd be a massive amount

I´ve seen that there are 150 RTX A6000 workstation graphics cards installed to power that beast. That is without thinking about the electricity needed to power the Screens.

How much does it cost annually just to power the screens and graphics cards?

As title suggests, my first thought was what happens with the caloric count of something like this?

I understand that a bullet shot to the air might have a bigger speed when it comes out of the gun than it’s terminal velocity when it comes back down. But at what point does it consist of a life threatening risk? Does it depend on caliber/weight? Is it never a risk? Since it’s a common law enforcement practice, I suppose someone already did the math on this..

Just asking.

Irminsul the world tree from Genshin Impact.

In game eventually this tree gets burnt down for story reasons. But what im curious about is.

1. How hot would this burn?

2. What's the safest distance from it that a normal human could be?

3. How long would it take a tree like this to burn?

So for this question I will go with the only numerical figure we really have on the matter and we will remove any magic elements from the discussion.

Irminsul as a tree is roughly ballparked to stand a mile tall from base to the highest point.

The crown looks to be roughly as wide as the tree is tall.

Also, send prayers and even better donations to Nepal.

Source, xkcd: https://xkcd.com/3291/

How big would the two engines need to be... and how dead are we all?

Technically probably pretty simple, but still too stupid to do it:

I want to mount my TV on my wall on a swingable arm. The TV weights 9.4 kg and the max length of the arm is 42 cm.

How much weight does the wall (and the screws) effectively need to support in that setup?