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What is a Necker cube?
The Necker cube is an optical illusion discovered in 1832 by crystallographer Louis Albert Necker. In a Necker cube, a two-dimensional drawing of a collection of cubes seems to open in different directions on the page.Graphic artist M.C. Escher incorporated Necker cubes in many of his works. Some examples of this are in his pieces entitled Convex and Concave, Belvedere and Metamorphosis.
What is an example of a three dimensional image?
A cube the simplest and oldest example of a three dimentional image
Give an example of a reversible change?
An example of a reversible change is an ice cube meting into water and then changing back to an ice cube again if frozen. Another is chocolate melting when heated and changing back to a solid when cooled.
What is a sectional drawing?
One which shows a cross-section of the object it represents, i.e. as if that object had been cut across. . For example, if you have a steel cube with a hole drilled across it from the centre of one face to the centre of that opposite, you would not see the hole if you view the cube from another side. If however you were to saw the cube in half across the diameter of the hole, each half-cube would have a semi-circular channel across the cut face. A sectional drawing would represent that cut face, with the half-hole depicted as two parallel lines.
The volume of a cube is 125 cubic mtr find the surface area of the cube?
The surface area of the cube is 150 square meters.
