Recent content by Plebeian

So the head of the Opera team resigned and now they are saying that Neutrinos travel at the speed of light. Don't Neutrinos have mass? If so how can they travel at the speed of light? http://www.bbc.co.uk/news/science-environment-17560379 Sandro Centro, co-spokesman for the Icarus...

I have been reading about the star system on wiki and noticed that one of the Alpha Centauri stars could in theory have a terrestrial planet in the goldilocks region. I also came to know that its orbit would only be stable for 250 million years. Given that these stars have been around for a few...

Maybe there was little more matter formed during the big bang and ended up forming the present day universe? Or may be the energy created due to the reaction of matter and antimatter converted to the mass that exists today? May be the energy released after the reaction manifests itself as...

Maybe all the anti matter that formed during the big bang mixed with matter and converted into energy? But then according to the big bang equal amounts must have been created which means hardly any matter would be left over after they reacted.

May be one day we can create a biological entity made up of entirely anti-matter.

How long will the Earth orbit around the sun before it falls out of orbit and into the sun?

My understanding of the Random Universe is Effect -> Cause-> Effect and so on. Here the existence of time is valid because it has a starting point, first law of thermodynamics does not hold, laws of physics can keep changing. On the other hand a Universe that existed since forever is a giant...

With out the sun's gravity? Can't you just treat it as a one planet system with a sun whose mass is equal to the mass of the Earth and the mass of the planet is equal to the mass of the moon?

A random Universe scares me tbh. It could begin anytime and end anytime. The laws of physics could suddenly change and what we know would be of no use.

i.e something happening out of nothing or was there no birth at all and all that exists today existed since forever?

Oh yeah. What if we expand space relative to everyother object except one? Or like the Alcubierre drive, expand the space behind the object and contract the space in front of it.

Regarding the Alcubierre drive.. His explanation seems plausible. I just thought that we need to contract space to move toward an object and expand space to move away from an object. Like objects stuck on a flat rubber sheet. We need to do exactly what space did to expand when the universe was...

Okay. Thank you for clearing that up for me. So for reaching large distances in a short space of time we can use the same principle right? If we can create an inflation drive that can expand/contract the space around an object then reaching far away distances could be made easier. I think...

Yeah I think you need to calculate the Synodic period.

Aim for the sky and you will hit the ceiling, aim for the ceiling and you will stay on the floor. Finish off the syllabus before hand( if not everything atleast two or three classes before the prof does). Practise a lot. I would suggest having small stick notes that outline the basic methods to...