Congratulations Oricorio on your win! Advancing even to semfinals is no joke - it takes a great amount of skill. I imagine the playerbase has only improved over the years too, so there's a huge amount of competition. Be proud of yourself!
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Show posts MenuQuote from: InsigTurtle on July 22, 2016, 10:34:55 PMHad a physics test today, was briefly confused by a question asking how much work needed to be done to lift an object from the surface of a planet to a distance infinitely far away.Since you only started electricity, I'm guessing the question you answered likely related to only gravitational energy. In which case, the answer would just be GMm/R; G is the gravitational constant, M is the mass of the planet, m is the mass of the object, and R is the radius of the planet. To find the difference in potential energy between two points (i.e. which for the question will tell us the magnitude of work that must be done to bring something from point A to point B), you have to take some sort of reference point (in this case, I chose the center of the planet), find the distances R_A and R_B of points A and B to the reference point, and then plug into GMm/R_A - GMm/R_B. For your question, R_A = R = Radius of Planet and R_B = Infinity, so that you get GMm/R - GMm/infinity = GMm/R - 0 = GMm/R
Quote from: BlackDragonSlayer on April 14, 2016, 02:19:33 AMI just want to make sure I'm not doing this completely wrong; we've done a few problems similar to this, but none completely identical:Your answer is correct. This is the Fundamental Theorem of Calculus joined with Chain Rule is that helps you understand it better. An easy way to check would be to evaluate yourself by taking the integral and then differentiating. However, as a word of fair warning, you might see in the future examples where you have to differentiate a function that doesn't have an elementary integral (e^x^2, as a common example), so it'll be useful for you to understand the general process for finding the solution than doing straight evaluations.
The problem is "Find dy/dx of ∫ sqrt(t) dt, with upper limit being tan x, and lower limit being 0," and my answer is sec^2 (x) sqrt(tan x).
Quote from: Ruto on March 20, 2016, 12:09:32 PMLol math minor and I haven't seen that ages and I'm too lazy to try. If you could take it now, it's better than taking it later, the high school AP stuff are jokes compared to the college courses.2-Acetyl, 4-Methyl, Cyclohexene-1-ol??? idk, taking a guess lol
Anyway, a professor assigned this to her NON-MAJOR chemistry students (CHEM 100) and I'm wondering how they can even do this when I had to look it up myself. I need to ask her to be sure lol, that's how bad it is xD I don't have their book so I've just been using the internet, hope their book actually explains it.
(Name the compound using IUPAC nomenclature)
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