Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**mel179****Guest**

[math]Hi there!

I forgot most of my math from school and uni and now I want to calculate the mesh size of a porous gel.

I came up with this equation:

x^3 = 0.8 (a+x)^3

I measured all values for a using nanoindentation so I need to solve this equation for x.

Could anybody help please?

Thanks a lot

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,378

hi mel179

Welcome to the forum.

Cube root both sides

note: cube root of 0.8 is approximately 0.9283.

On a calculator press the y^x button (some calcs show incorrectly as x^y) with (1/3) as the y value.

ie. 0.8 y^x (1/3)

Hope that's what you need.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mel179****Guest**

Wow! I didn't expect it to be so easy, that's embarrassing for me.

Thank you so much!!!! You made my day

Pages: **1**