A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
Rules
This is a science community. We use the Dawkins definition of meme.
These days, everything seems to be made out shit & piss.
What if a planet that is Earth-sized falls down on Earth from let's say 5-10 meters though?
Straight to jail.
A thing that size would have initial velocity to begin with,
But acceleration does not depend on mass, (which is kinda weird from an earthling's perspective), which Einstein formalized in an amazingly powerful theory called General Relativity
It would fall at 2g, because two Earth-sized masses attract each other in that case. With smaller objects it's just 1g, because the mass of, let's say, a nice cup of tea is negligible compared to the mass of Earth.
Aristotle said so much dumb shit, like he said that women have less teeth and never bothered to check
To be fair to Archimedes, heavy objects do usually fall faster than light ones*, and to be fair to Newton, stuff coming towards you usually has a higher relative velocity than things going away from you.+
*You need your objects to be weigh a lot relative to their air resistance to notice otherwise.
+You need some pretty ambitious equipment to detect that electromagnetic radiation such as light does not follow this pattern.
If you like novels I highly recommend Galileo's Dream by Kim Stanley Robinson. It has a moment where Galileo realizes you could "weigh" time, in his experiments with objects rolling down an inclined plane.
I am most certainly not a science whiz but it's so goddamn funny to see this whole comment section full of people just... explaning and correcting each other poorly with varying degrees of correctness. Just like 50 half-true and misremembered tidbits from everyone's intro to high school physics class, blindly seeking targets in space. I promise you guys, there's a very straight answer to this like two or three clicks away, written more clearly and succinctly than anyone here is managing to do.
I have noticed there is a bit of a more "anti intellectual" bent on Lemmy compared to Reddit. Like there is a lot of stupidity on reddit but usually someone comes in with actual knowledge. On Lemmy I just see people arguing in circles with each other with nobody ever actually looking anything up.
Like there is a lot of stupidity on reddit but usually someone comes in with actual knowledge
Be careful with that, actually. Reddit mastered repeating an explanation or analogy they read on another thread or saw on YouTube, but being quite eloquent at explaining it. Problem is, if they misunderstood it to begin with, they'll just as confidently repeat a broken version.
I didn't notice it at first... then I started seeing explanations for things on my field and cringed at how wrong they were, and then I started noticing the pattern and the very repeated analogies on other areas too.
IMO, it's okay to have casual conversations without being an expert or researching every post. Redditors' habit of fact-checking everything is honestly tiring. Conversation has other purposes besides education. I think many people are looking more for human interaction than for correct facts.
Right but conversations about science where all parties are wrong and nobody is willing to actually look shit up are completely pointless. It's the exact same problem that caused the situation in the OP in the first place.
actually your wrong
You're*
~~wrong~~ right
FTFY
Don't tell them that. You're contaminating my petri dish. ;)
Lemmy (or most social media) in a nutshell.
Rosencrantz: [holds up a feather and a wooden ball] Look at this. You would think this would fall faster than this.
[drops them. ball hits the ground first]
...and you would be absolutely right.
~ Rosencrantz & Guildenstern Are Dead
https://www.usgs.gov/water-science-school/science/how-much-does-a-cloud-weigh
Doing the math: 1,000,000,000 x 0.5 = 500,000,000 grams of water droplets in our cloud. That is about 500,000 kilograms or 1.1 million pounds (about 551 tons). But, that "heavy" cloud is floating over your head because the air below it is even heavier— the lesser density of the cloud allows it to float on the dryer and more-dense air.
Planes, helicopters- lots heavy stuff not falling faster than lighter ones
When accounting for air resistance, heavy objects do fall faster than light ones. They couldn't test in a vacuum back then, they only knew how things work here in Earth's atmosphere.
A similar size chunk of iron and coal would have done the experiment just fine. Any two objects of the same shape and size but significantly different densities.
They could just drop an empty bs filled wine bottle.
Maybe fill it with mercury (but don’t drink it)
If two objects have the same size and shape, the force applied by air resistance will be the same. However, if two objects have different mass, that same force will result in different acceleration.
The thing that always gets me about the Renaissance is Galileo:
He did those experiments with things falling down? Measuring speed?
Yeah. Without a clock.
The theory for how to build those came later, based on what Galileo did.
Clocks existed then though. The oldest clocktower in Europe that still exists was built over 100 years before Galileo was born, and time measurement existed longer than that. You can measure time fairly accurately with water clocks which had been known for thousands of years before Galileo. Not having "modern" pendulum clocks yet doesn't mean that they didn't have any way to measure time. Even without water clocks you can get decently reliable measurements of time with rhythmic chants (think how today we might say "one Mississippi, two Mississippi, etc.). Early alchemical recipes often include time measurements in chanting a specific prayer or passage a certain number of times during a specific step. Sure you're not going to get milisecond level accuracy this way but you don't really need that for a lot of things. Hero of Alexandria built mechanical automata 1500 years before Galileo using pulleys and weights as timers. Time measurement not only existed before pendulum clocks, it was pretty decent.
Couldn't even measure it in Mississippis because they hadn't discovered it yet.
Man, being a cop must have sucked before they invented time.
Officer: do you know how fast you were going?
Lord: No, do you?
Officer grumbles: you're free to go.
Carriage pulls away
Officer ClocknTime: For now, for now.
Alright, I'm stealing this one for a Pathfinder session
With same gravity constance everything fall down at the same speed, but only in a vacuum. In an atmosphere there count the air resistance of an object, even if they are made of the same material and weight, an iron sphere of 1 kg fall faster than a iron sheet of 1 kg.
That's why Gallileo's balls were so special.