5 ms·
Or there's a common trigger event, like, say, a large gravitational wave or a passing cloud of weakly interacting matter(dark matter?) which triggers both incre
by 01100011 3y ago
Or there's a common trigger event, like, say, a large gravitational wave or a passing cloud of weakly interacting matter(dark matter?) which triggers both increased cosmic ray emissions along with earthquakes.
Not that I believe any of this, but it seems we're just pulling stuff out of our asses so I figured I'd give it a shot.
- dmead 3y agowe should definitely just reverse the shield polarity and be done by the third act. hopefully the robot can learn a lesson about humanity before the end credits.
- civilitty 3y agoI’m afraid only the power of love and empathy and togetherness can resolve this climax
- rationalist 3y agoDiscovery will probably be the only Star Trek show that I never finish watching. So far season 1 of Strange New Worlds has been pretty good. (And each season of Picard was way better than the previous.)
- dmead 3y agoSame. The first season was enough for me. Never again.
- kanzenryu2 3y agoOne aspect of gravity waves is that other than being extremely weak, they cannot perform work. So they don't cause mechanical forces.
- hughesjj 3y agoWait, really? Why not? That's fascinating Edit: ah, you mean for any practical purposes. Duh.
- aftbit 3y agoOh really? I didn't know that. If they cannot perform work, how can we detect them?
- heisenzombie 3y agoThe OP might be making a more subtle point, but my understanding is they absolutely can do work. We can measure the deceleration of binary neutron stars with a rate predicted by the emission of gravitational waves. Deceleration == work. However, we can also measure things that don’t do work, for example, a static magnetic field does no work on a charged particle (it cannot change its kinetic energy) but look at the swirls in a cloud chamber and it’s clear as day if there’s a magnetic field there.
- kanzenryu2 3y agoI'm wrong on the work thing, but I don't think we can always regard deceleration as work, since that only works for Newtonian mechanics. Under GR there is an extra term in the equation allowing for acceleration without work.
- tobinfricke 3y agoThis is not true, and in fact there is a very famous thought experiment called the "sticky bead argument" that was pivotal in developing the consensus that gravitational waves are a real, physical effect and not just a "gauge" effect (an artifact of the coordinate system): https://en.wikipedia.org/wiki/Sticky_bead_argument https://en.wikipedia.org/wiki/Sticky_bead_argument On the other hand, I definitely agree that gravitational waves are almost certainly too weak to cause any tectonic effects.
- kanzenryu2 3y ago
- sbierwagen 3y ago>gravity wave LIGO, the gravity wave detecting interferometer, has arms 4 kilometers long. Along that distance, it can detect a change in length one ten thousandth the diameter of a proton. With an instrument that sensitive, it can just barely detect a handful of gravity waves a year, out of the thousands? that occur in the observable universe. Gravity waves are subtle things.
- Retric 3y agoI guess the question becomes if tectonic plates be more or less sensitive? They are significantly impacted by tides for example.
- deepsun 3y agoThere are different kinds of gravitational waves, LIGO doesn't see them all. Related: https://cplberry.com/2015/01/10/1408-0740/ https://cplberry.com/2015/01/10/1408-0740/
- Gravityloss 3y ago> ground-based detectors like LIGO measure the higher frequencies, pulsar timing arrays measure the lower frequencies, and space-borne detectors like eLISA measure stuff in the middle. Does this data correlate with weather events, earthquakes or cosmic rays?
- tobinfricke 3y agoWeather events and earthquakes - no. Cosmic rays - Astrophysical events that generate gravitational waves can also generate electromagnetic and particle emissions. If a black hole crashes into a neutron star, all kinds of stuff is going to come out.
- nasalspirant 3y agoAlso, gravitational* waves. Gravity waves are something else: https://en.wikipedia.org/wiki/Gravity_wave https://en.wikipedia.org/wiki/Gravity_wave
- User23 3y agoIt's a tangent, but gravimeters[1] are really impressive feats of engineering. [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5713048/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5713048/