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‘It’s almost science fiction’: Scientists say the shape of Earth’s inner core is changing
Of all Earth’s layers, the inner core is the most remote and mysterious. This solid sphere of iron and nickel is about 70% the size of the moon, with a radius of approximately 759 miles (1,221 ...
Hackaday1y
3D Printing A Nifty Sphere Without Supports
The trick is mainly to print the sphere in two parts ... and printing at a higher temperature to ensure solid bonding between each layer.
BBC4y
Surface area and volume - WJEC
A sphere is a perfectly round solid figure. All points on the surface of the shape are the same distance away from the centre – we call this distance the radius. The formula for the volume and ...