A sphere which had a radius of 1 astronomical unit (the average distance between Earth and the sun) would require more material than exists in the entire solar system. It is far more likely that ...

[DaveMakesStuff] demonstrates a great technique for 3D printing a sphere; a troublesome shape for filament-based printers to handle. As a bonus, it uses a minimum of filament. His ideas can be ...

INTO a hollow sphere of unit radius, with a curva-ture or bend, therefore, 1, put two solid spheres of radius, or bend + 2. The two solid spheres then kiss each other at the exact centre of the ...

This can be done on a calculator by \(4 \div 3 \times \pi \times {6^3}\) , using the \(\pi\) or if you don’t have a scientific calculator, use 3.14) ...

With 3D printed arms of fixed measurements, the depth reading from a set of digital calipers can be used to calculate the radius of a curve. Specialized tools that focus on one particular job tend ...