Thomas Moerschell

@julia_bergeron @SpaceOffshore @NASASpaceflight Weren't they usually covered under a tarp? Or was that just while they were on the ships?

SpaceX transporting the fairing halves from the Starlink 6-14 mission back to be refurbished and flown again. Just another day on the Space Coast! @NASASpaceflight 24/7 views: nsf.live/spacecoast

@Kaju_Nut Never have I read so much incomprehensible jargon for me, a poor guy just starting university. But I admire people making sentences with those and getting some kind of point through

I asked people who work on string theory/ holography about that one wow moment that sold them on the subject. Here are some of the responses 🧵

@Erdayastronaut @davmander With a pulley ratio of 3:1, the counterweight will not be accelerated at 1g (because it is being retained by the pulley), so the other side won't get to 3g either. I have a solution in the replies

@davmander This is the most common solution I've come up with is a 4 : 1 weight ratio and a 3 : 1 pulley ratio, but I'm not sure if it's correct

Ok, we've had a debate in discord all day now on what seems like a really easy math / physics problem, but we all keep going in circles... so let's take it here. You have a tower with a pulley system that has two weights. You're trying to accelerate one side of the system vertically with 3 Gs of net acceleration. How much weight do you need at the other end and at what pulley ratio (ignoring loses like friction / air resistance etc) Some things to keep in mind, the counterweight can't fall faster than 1G, so we need a pulley ratio greater than 3 : 1 just simply due to that fact. Also keep in mind the first 9.8 m/s2 of potential acceleration is lost to gravity which is why if you have a simple 1 : 1 pulley with a 2 : 1 weight ratio, the object only accelerations with 3.27 m/s2 of acceleration. It's weird and it's been breaking my brain for some reason! Anyone able to solve and show your work? We've come up with like 4 answers that all seem like they could be right, but obviously they can't all be right... HELP 😅

@codingfodder @15Redstones @Erdayastronaut I found the same, but just trying out ratios 4 through 7 to find out where the minimum mass ratio was. I thought maybe there could be a better answer with exotic non-integer ratios (think 13:2 or the like). But your explanation makes sense

@15Redstones @Erdayastronaut Admittedly I didn't do a good job at that. I balanced the forces, but because I didn't want to make a differential equation I just picked 0.5g for the counterweight since I knew it would give integer answers. It just also happened to be optimal, but I got lucky.

@Erdayastronaut Also Tim this is not a good way to launch rockets

@Erdayastronaut So for example you could have a 4:1 ratio with m1 = 64*m2, or a 5:1 ratio with m1 = 50*m2, or a 6:1 ratio with m1 = 48*m2, or a 7:1 ratio with m1 = 49*m2, or a 8:1 ratio with m1 = 51.2*m2

@Daanos_iii @Erdayastronaut If you have a countermass 4 times as heavy and a pulley ratio larger than 4:1, the countermass will actually get pulled up by the mass you initially wanted to launch 3g in the other direction

@Erdayastronaut Ideal EZ scenario: Choose a mass and a countermass that's 4 times as heavy. Choose a pulley ratio so that the countermass nearly doesn't move/accelerate. Your light mass will have a net force of 3 times its weight, almost 3G due to minor losses to the inertia of the heavier mass

@swickenburg @Erdayastronaut I've found the same as you

@Erdayastronaut If you attach the counterweight on the pulley (the opposite of the usual way to use a pulley) you need a counterweight of 4 N^2 m/(N-3). So for example for N=5 you need 50 m.

@Erdayastronaut Note: depicted is a 2:1 pulley ratio which is of course incorrect, but it's just enough to show the concept

@joebarnard It means it is really happy today

Is this good for the GoPro?

@ThreatNotation On a serious note, trying to help, it could be 51 32 41 52 41 32, or 51 32 41 32 51 42 Or if you wanna be a little more exotic, you could try 51 42 31 42 51 42 🤷

@LinuxSeb I just deleted Edge from my linux dual boot because I couldn't figure it out in Windows

Lmao I love Linux

@moonyriott Imagine going through it the other way. Even with no (very low) speed, you would end on the other side moving at the same speed as the trolley, which shows that relative velocity counts. So they would clearly go flying out that portal.

my husband and his work buddies have been arguing about this photo for an hour

@depthsofwiki I see a problem

I love this fictional dog breed so much

@DrPhiltill If we take a look at the other side, since probably most people agree that humans are conscious beings; are we always conscious? Even when knocked out or in dreamless sleep? And what would be making the difference there?

Q9: If you put yes for some questions but no for others, where did you draw the line and why? What is the principle that you think is important regarding the emergence of consciousness? Thank you for taking the time!

Please RT. Here is a multi-question poll on the nature of consciousness. I’m wondering where people will split between Yes and No. Question #1: If you create an artificial brain using electronics exactly matching the organization of a human brain, will it have consciousness?

@EnzoDiependaal @wef Can we also talk about the fact that 0.2 W (or whatever it should be) is laughably little ? You should be able to get much more from even a simple turnstile, right?

If this describes the competence of the @wef with regard to energy, I would be concerned for very different reasons... This is the stuff that makes engineers cry:

@joebarnard Explaining what hydrostatic testing should NOT do?

Party time in the shop! What do y’all think these are getting used for?

@SpaceX They really only flexing on everyone else at this point

Falcon 9’s first stage has landed on the Just Read the Instructions droneship, completing the first 16th launch and landing of a booster

@DrPhiltill I think it must have something to do with direct lighting from the sun. Is it possible that wind could create some asymmetric wave patterns, with mean gradients pointing in opposite directions before / behind the wind front?

@tmoerschell I can see it barely in the video but more clearly in the photos. Fascinating! I don’t understand the dark/bright pattern either. I would expect wind to make it darker by roughening the surface. I don’t know a mechanism to make it that bright.

@DrPhiltill on your recent obsession about wave patterns. I was recently able to spot it on the beautiful Gelmersee in Switzerland. Wind was blowing towards us (the direction the patterns are travelling). I'm a bit confused that the bright patterns are preceded by darker areas..