Recent content by CatAteMyHW

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    Linear Independence/Dependence of Vectors

    I was learning about the same topic and found this problem. As per HallsofIvy, k1(1v1 + 2v2 + 0v3) + k2(0v1 + 3v2 - 1v3) + k3(1v1 - 1v2 + 1v3) = 0 rearranging... v1(1k1 + 0k2 + 1k3) + v2(2k1 + 3k2 - 1k3) + v3(0k1 - 1k2 + 1k3) = 0 now, coefficients of v must be 0 1k1 + 0k2 + 1k3 =...
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    Time as an illusion that arises from motion.

    I've chosen words correctly... I think. Motion is always related to things (particles, bodies etc) and not events. You cannot move an event! A thing moves - that's an event (or a set of events). I would agree with "without motion there is no time". In fact that's my whole point. Can you measure...
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    Time as an illusion that arises from motion.

    Thanks for the input. Consider this.. Let's have a simpler clock used as a standard in relativistic time-dilation examples. Two parallel planks 1/299,792,458 of a meter apart with a photon oscillating between them. Now let's say you fire a photon and time the duration with that clock till it...
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    Time as an illusion that arises from motion.

    Good-evening members! For some time now, time is really bugging me. Especially this line in the Wikipedia entry on Time I came across http://does-time-exist.info/" [Broken] that says that time is sort of an illusion created by motion of things in space. So my question is, can we describe...
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    Calculate the speed of other car

    Yup. In fact my intent was to have something better than just guessing "That car must've been above 100!". So as long as I take the measurements in just the right conditions I can guess with a level of certainty. Yup. Though I'm relying on the brain's 3-D perception for minimizing parallax...
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    Calculate the speed of other car

    Yea, thanks for seconding on that. I calculated it to be just 'y' myself. But when posting, I looked at the stunningly accurate graphic(/s) I made in MS paint and saw that carB is covering twice the distance than carA in each 'second' so something must've been wrong in my calculation d'oh...
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    Calculate the speed of other car

    Yes. That was the first thing on my mind but I realized buying one (or using it where I live) wouldn't be too easy for me for some reasons. But isn't all-done-in-head way much cooler? I can see how this would seem trivial to you guys calculating and exploring speeds much much greater than...
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    Calculate the speed of other car

    Hello everyone! I was just wondering that while driving, is there a way to calculate speed of an other car that passes you? I worked out a way but I needed more heads on this [that's what she..meh] so here's it: When the car traveling faster than me goes pass me(me - carA;other car - carB), I...
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