Recent content by cjackson

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    Stargazing Assessment of astronomical numbers like those of Proxima Centauri

    Yes. But I want to know if the sizes are to scale and if those planets could fit between Earth and Moon.
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    Stargazing Assessment of astronomical numbers like those of Proxima Centauri

    My point is wanting to know the accuracy of the numbers in the op.
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    Stargazing Assessment of astronomical numbers like those of Proxima Centauri

    Proxima Centauri is 4.2 light years away. That is 24,673,274,438,400 miles. Going at the speed of the Sun through the Milky Way, 492,150 miles per hour, it would take 5,723 years to get there. In 100 years the Sun has only gone 431,123,400,000 miles, or 7 percent of 1 light year...
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    What is the largest an animal can be?

    I know the blue whale is the largest known animal to have existed on Earth, but can animals conceivably grow larger, or is that pretty much the largest animal you can expect to find in the universe?
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    High School How can I factor these polynomials?

    How do I factor monomials, binomials, trinomials and quadratic equations? Here are some more examples from the book. 24x^3y^2-20x^2y^2+16xy^2 x^2+5x+6 3y^2+8y+4
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    High School How can I factor these polynomials?

    It's straight from the book.
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    High School How can I factor these polynomials?

    I'm in desperate need of help with factoring. Basically, how do you do it? Below is an example of what I'm up against. 54c^2d^5e^3; 81d^3e^2 It wants me to find the greatest common factor. http://www.rempub.com/80-activities-to-make-basic-algebra-easier That is the book I'm working out of.
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    Undergrad How Can We Reach Habitable Exoplanets?

    According to Wikipedia, there could be as many as 11 billion planets in the habitable zone of sun-like stars, with the closest potentially 12 light years away. That number goes up to 40 billion if you include red dwarfs. How would we even go about getting to the nearest Exoearth?
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    Graduate Macroscopic Objects at Relativistic Speed

    How much greater would the energy requirement be than what humanity has ever generated up to this point? Something like that.
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    Graduate Macroscopic Objects at Relativistic Speed

    I have no physics background.
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    Graduate Macroscopic Objects at Relativistic Speed

    I have no idea.
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    Graduate Macroscopic Objects at Relativistic Speed

    Frankly, I don't know how.
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    Graduate Macroscopic Objects at Relativistic Speed

    How much energy would be required to accelerate something the size of the space station to the same speed as protons colliding at the LHC?
    • cjackson
    • Thread
    • Macroscopic Relativistic Relativistic speed Speed
    • Replies: 10
    • Forum: Mechanics
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    Graduate Is there an unseen part of the universe older than the known universe?

    The best theories have the universe arising from a singularity 13.8 billion years ago, and have it expanding, becoming increasingly dilute and frigid for eternity. Do you think the Copernican principle holds for the universe and that we inhabit a small part of a vaster cosmos permanently beyond...
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    What Pop Science Books Should I Read Next?

    I finished Rees' Before the Beginning and am now reading The Shadows of Creation. At what point should I get out of the popular books and into textbooks?