Try to get your head around this while simultaneously not thinking of gravity as a force but curvature in spacetime.
No, don't! Use the simplest model that applies in your context!
Does Earth have two high-tide bulges on opposite sides? (2014)
31–40 of 96 posts
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#32So, yet another thing I learned at school was bullshit. Pretty interesting to know!
What are the others? The Bernoulli principle is one.
The Bernoulli principle is not bullshit -- it is very valid physics.
You might be thinking the way it's often used to wrongly explain how airplane wings generate lift. Yeah, that's bullshit. I mean, the principle still applies, if applied correctly. The equal transit bullshit that it's often associated with, well yes, that's complete and utter bullshit.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#33Damn, I just had one of those moments where you go from thinking you understand something to realizing it's really complicated and you don't understand it at all.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#34I think of it not as Newton was wrong, but rather his explanation was incomplete.
Most kind way of saying Newton was a simple man.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#35Try to get your head around this while simultaneously not thinking of gravity as a force but curvature in spacetime.
No, don't! Use the simplest model that applies in your context!
exactly, like water is excellent model for electricity, but youtubers want to be edgy, provocative so they intentionally drop something which needs 20+ years of intentional thinking / education on high schoolers.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#36In the animations, New Zealand stood out: the high and low tide chase each other counterclockwise around the islands!
earth is 3D not 2D ;) "bulges" same. that is where confusion comes from. also tesseract is nonsense.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#37[flagged]
Can we at this distance tell the difference between bipolar, mercury poisoning, and repressed homosexual? He was also responsible for the execution of a couple of dozen people. These executions were connected to his position as master of the mint.
Executing counterfeiters is certainly distasteful to us today, but I find it less distasteful than ideologically motivated crimes by modern scientists such as Lakatos (one of my intellectual heroes who I find it difficult not to despise as a person).
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#38So it's a bunch of complicated splashy water that is excited by the moon moving past, and follows along at the same frequency - but it's not a simple wave travelling around the world, for various reasons. The earth itself is squashed like that with two bulges, but the water on the surface exhibits a more complex motion.
> So it's a bunch of complicated splashy water that is excited by the moon moving past This explanation is so much better. If people want to use big words they can say fluid dynamics, but yeah, it's a complex system with a big orbiting body pulling on it regularly, that gives the complex system rhythm but not order.
That would be akin to describing a computer as a complicated arrangement of switches that control each other through pulses of electricity to do useful stuff. While it may satisfy a bunch of people who aren't really interested in how computers work, and it may even inspire a few people who are intrigued by how such a simple notion could produce incredible results, it doesn't really explain how computers work.
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#39When I was in grad school in astronomy, one of my professors told me "many a promising young researcher has run their career aground on the rocky shores of tides." The mathematics involved in the theory of tides are formidable. Even in homogeneous, tidally locked systems things can get complicated very quickly. But tides are nevertheless very important. One two objects pass very close to each other, tidal effects are…
destruction (or nearly) via tidal mechanics happens in several of larry niven's short sf stories
Re: Does Earth have two high-tide bulges on opposite sides? (2014)
#40When I was in grad school in astronomy, one of my professors told me "many a promising young researcher has run their career aground on the rocky shores of tides." The mathematics involved in the theory of tides are formidable. Even in homogeneous, tidally locked systems things can get complicated very quickly. But tides are nevertheless very important. One two objects pass very close to each other, tidal effects are…
destruction (or nearly) via tidal mechanics happens in several of larry niven's short sf stories
As I recall there were issues with the math in Neutron Star though still a very good story.