Surface area of 380 km by 380 km (236 mi by 236 mi) in the Sahara desert required to power the world with solar energy only. Concentrated solar power (CSP, also known as concentrating solar power, concentrated solar thermal) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight onto a receiver. Electricity is generated when […]
The effect is a result of lightness perception, or the concept that our eyes perceive colors differently based on the shade of whatever object is in the background or foreground. Put simply, if there is a bright background, objects in the foreground will appear darker. Likewise, if the background is dark, objects in the foreground […]
Here’s a useful info for you guys: one 18 inch pizza has more ‘pizza’ than two 12 inch pizzas. Area of two 12″ pizzas: 12/2 = 6 6×6=36 36xπ = 113.1 in² x 2 = 226.2 in² Area of one 18″ pizza: 18/2=9 9×9=81 81xπ = 254.5 in²
A Tesla valve, called a valvular conduit by its inventor, is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts. The device is named after Nikola Tesla, who was awarded U.S. Patent 1,329,559 in 1920 for its invention. The patent application describes the invention as follows: The interior of the conduit is provided with enlargements, […]
Brick bonding is a pattern or framework in which bricks are laid. There are many various bonds in brick masonry, and each has its own look, installation difficulties, and in the case of walls, structural considerations.
A level is an optical instrument used to establish or verify points in the same horizontal plane in a process known as levelling, and is used in conjunction with a levelling staff to establish the relative heights levels of objects or marks. It is widely used in surveying and construction to measure height differences and to transfer, measure, and set heights of known objects or marks. It is […]