Recent content by SidBala
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Undergrad Is Marilyn Vos Savant wrong on this probability question?
I haven't read through the thread. But in short, she is right. Any one valid string of dice rolls is just as probable as any other. So what are people talking about for 9+ pages?- SidBala
- Post #136
- Forum: Set Theory, Logic, Probability, Statistics
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Undergrad Earth Mass Increasing? Photons and Photosynthesis making more matter on earth?
Inside the sun, fusion takes place. Fusion is a process by which light elements combine to form heavier more tightly bound elements. So basically: A + B -> C + energy But when we add the masses of A and B and then compare it to C, we see that C weighs less than the sum of (A+B). Where... -
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High School Is Earth's Gravity Changing Day to Day?
I've worked with MEMS accelerometers in the past. There are multiple sources of error. Firstly the accelerometer on the phone is not that accurate. I suspect it is using a 6D gyroscope/accelerometer chip. These are manufactured with size and cost in mind, not accuracy. Secondly, most...- SidBala
- Post #15
- Forum: Astronomy and Astrophysics
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Testing Mindless rules that need to be followed in exams
Some middle school/high school teachers don't know any better. I remember very clearly that my physics teacher was more interested in doing things "her way" than to entertain and encourage the methods I developed myself in solving problems. It was all a matter about having power and control...- SidBala
- Post #5
- Forum: STEM Academic Advising
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Why is the Earth's size not odd?
I suspect that if Earth was the smallest planet in the solar system, you would be saying: "It is smaller than all it's neighbours, which is odd. Obviously it is not as small as the moons but they are not real planets." There is nothing odd about the Earth's size. Or at least, we cannot say...- SidBala
- Post #14
- Forum: Earth Sciences
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Calculate Acceleration Given V0 and X
At what angle will the ball travel the maximum distance? Think about that. The rest of the problem should follow naturally.- SidBala
- Post #2
- Forum: Introductory Physics Homework Help
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Undergrad Can light excite an electron from ground state to a higher state?
There is no difference between UV and visible light except for their wavelengths. I suspect your textbooks mean EM radiation when they mention "light" and not specifically visible light.- SidBala
- Post #3
- Forum: Quantum Physics
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Undergrad Formula to convert 3d co ords. into 2d orthographical co ords.
Take a new set of 3D basis vectors with respect to your projection plane(two in-plane and one normal to the plane). Convert your existing coordinates to this new basis(dot product each vector with the new basis vector to get the component in that direction). Then drop the normal values.- SidBala
- Post #2
- Forum: General Math
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Graduate Do atoms always exist even when unobserved?
First of all: Electrons have mass. Atoms, molecules, both massless and massive particles, all exhibit quantum behaviour. Secondly: The act of measuring a physical observable(like position) forces the wavefunction to an(or multiple) allowed state of that observable. This does mean that electrons...- SidBala
- Post #10
- Forum: Quantum Physics
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Undergrad Crazy thing happens when I play with my laser
I would suspect that an interference pattern is being generated from the two interfaces of the mirror. Try doing the same experiment with the shiny side of tin foil instead of a mirror. I would expect the pattern to be not present if the above hypothesis is true.