What RPM would guarantee that 0 drops hits the person who's skipping the jump rope?

What is the best way to measure hardness?

I need this boost man. Theres too much i dont know such little time

well /sci/? what field is going to be more useful for saving humanity? solid state/condensed matter or photonics/nanophotonics

What are the implications of the double-slit experiment?

Suppose you have a sink with two holes in it, and you are blindfolded, and you drop a ball into the sink and you can't take the blindfold off until after the ball falls through one of the holes. And then you have to observe the ground to see which hole it went through, because you weren't looking then.

And you find two marks on the ground as if the ball landed twice and went through both holes somehow...

And you say that's impossible so you create a motion sensor on each hole, and only the hole it goes through will light up red with LED lights, and you try it again, but now there is only one hole that is lit up and only one mark on the ground. Like the ball itself changed its behavior and the universe itself changed its rules because it didn't want to contradict with your experiment. But the first time there was nothing to contradict, so it didn't have to follow the same logic the first time.

As if the rules of the universe are dependent and not absolute somehow.

Are all Universities like this?

Realistically speaking, how much more efficient can indoor farming become if we take reduced nutrient supplements reduced herbicide into account? You also can use V-spotlights since you don't need to light the entire soil and you don't need any heavy machines.

You know the gambler's fallacy is not a real fallacy right?

What's a way to completely destroy trans people and trans ideology scientifically?

People always say electronics and computers are proof that quantum mechanics is legit.
But where exactly is the connection there? Which insights from QM leads to electronics that couldn't possibly exist otherwise?