Recent content by alewisGB

My question was relating to Units only, If two units are in SI and you do dimensional analysis on the two different units that come to the same dimensions does that mean the units are equal? e.g Resistance Ω Is equvilant as Inductance H * frequency Hz so, A resistor could be measured as 100 H...

If two units have the same dimensions are they always inequivalent? I was thinking, would doing dimensional analysis on units prove they are equivalent or could they have the same units but not be equivalent.

E = 0.5 * m * v^2 I got it :)

Homework Statement before a potential barrier show; ψ(x) = B*sin(kx-∅) B, k and ∅ are all possitive Is a solution of the one dimensional Schroedinger equation Homework Equations ψ(x) = B*sin(kx-∅) Eψ(x) = -(ħ2/2m)(d2ψ(x)/dx2)+U(x)ψ(x)The Attempt at a Solution If it is before the barrier U(x) =...

Thank you ever so much, you have no idea how grateful I am. This will help me in now but also in the future :)

I have got the answer of -√5 > x and 5 > x > -2 I have not done further maths and although inequalities were covered they were not nearly this complex I have not seen the rule "0 > (x-a)(x-b)(x-c) with a<b<c" So I am not sure what that means Thank you for your help :)

for: 1/(x+2)>x-2 Step 1: x+2>x3+2x2-4x-8 Step 2: 0>x3+2x2-5x-10 Step 3: 0>(x+2)(x2-5) Step 4: if 0=(x+2)(x2-5) x = -2 or +√5 or -√5 Step 5: Unsure, do input -2.01 and -1.99 and see which one is true? (same for +or-√5) or do I do something else

I am looking at questions like 1/(x+4)>x-4 or 1/(x+7)>x-7 I have no idea how to solve them, I have simplified to (-x^2+50) /(7+x) however I don't think it is correct and I don't know what do do from there.

There are loads of proofs, I think a simple one is the initial probability if 1/3 yes and 2/3 no. The initial probabilery can't change at all so the chance of winning if you stick is always 1/3

Sorry but the strenth of the magnet needed is too strong, more information is needed to work out how strong but if you are needing to lift it by 50cm the magnet would not be consumer grade and not a permanent magnet!

Thanks!

A) PE at point a and KE = KE at point b So m*g*h + 0.5*m*u^2 = 0.5*m*v^2 I think you can do the rest B) Nope C) KE lost = PE gained I can't see the numbers on the image attached!

Calculate the electrostatic force between a proton and a gold nucleus Au with a distance 7.5x10-13m 19797Au The Electrostatic force is (Q1Q2)/4∏ε0d2 Two things I want to know, the charge of the gold and how to find the charge of Atoms! All I need to know is the charge, I can do the rest!

im not a chemist I am more of a physician?

what is the best formula for elephants toothpaste not using yeast using potassium iodine and hydrogen-peroxide(30%) and of course soap. how much reactants would i need to fill let's say... 100m cubed (im not going to do that much but its easier to work with) * how long would the reaction take...