Recent content by ericksvensson

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    Can stretching exercises lengthen spinal cartilage and increase height?

    http://www.betaller.com/whyitworks.htm Greetings, PF community. Certain product has come to my attetion, as it claims to be an exercise and health guide to grow up to 3 inches in an average period of 5 months (depending on the effort you put on it). The whole thing has to do with...
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    Graduate Does the Big Crunch involve space contracting or just galaxies collapsing?

    Greetings, PF community. I have a very simple question regarding the Big Crunch theory. As far as I know, the Big Bang was not an explosion in space, but expasion of space itself. But how about a possible Big Crunch? Does this theory deal with the contraction of space itself, or is it just...
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    Graduate Is 1/0 really infinity, or is it undefined?

    Let me guess: Michio Kaku on 'Who's afraid of a big black hole' describing the equation that led to a singularity?. I remember I had the same question.
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    Graduate What happens to Earth's orbit if the Sun disappears instantly?

    https://www.physicsforums.com/showthread.php?t=360044&highlight=speed+of+gravity I've found several threads about this question, so feel free to delete this one if needed.
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    Graduate What happens to Earth's orbit if the Sun disappears instantly?

    Thank you for your reply. I've been trying to search for some information about the subject, and I've come up with this article. http://math.ucr.edu/home/baez/physics/Relativity/GR/grav_speed.html If this result was only within 1%, how can scientists be so sure about the speed of...
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