Check my work Definition and 203 Threads

  1. N

    How to Solve a Buoyancy Problem

    Buoyancy problem, please check my work :) Can you check my work here? A crown is weighed in air and submerged in water. The scale reads 7.84 N in air and 6.86 N in water. find (a) the buoyant force (b) the volume of the crown (c) the density of the crown (d) is the crown made of gold...
  2. P

    Possible Mistakes in Calculus Problems

    Please double check my work ! Hi, I basically did out all the poroblems. I just need someone to double check whether I made any mistakes in the answers or procedures. (My prof is a real dickhead and marks down for the smallest mistake) Also can I simplify any answers, just like obvious stuff...
  3. Z

    Calculating Volume of Revolution: y=x-x^3 from 0 to 1 about the y-axis

    Hi could you please say if this is right or wrong and if it is not where I went wrong. I got the question: Find the volume of the area between y=x-x^3 from 0 to 1 revolved about the y-axis. So here are my workings: V = \pi \int_0^1{x^2dy} V = \pi \int_0^1{x^2 \frac{dy}{dx}dx}...
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