From engineerguy. Bill explains how the two-liter plastic soda bottle begins as a plastic tube, called a preform, which is heated and inflated with air in a bottle-shaped mold. He explains how the stretching of the preform creates a crystalline regions in the bottle’s plastic (polyethylene terephthalate) that create a bottle with great strength, low…

From engineerguy. Bill explains that the adhesive used in tape is a viscoelastic substance — a substance that can act like a liquid or a solid and that can be elastic. It is this behavior that allows duct tape to adhere with light pressure, hold tight, and let go when peeled from a surface. Bill’s…

From engineerguy. To understand how duct tape is engineered, Bill dissolves the tape in solvent to reveals its three components — plastic backing, adhesive, and cloth reinforcement. He explains the function of each part, highlighting that the adhesive is a viscoelastic substance — a substance that can act like a liquid or a solid and…

From engineerguy. How skyscapers became lighter: The Empire State Building compared to the Willis (formerly Sears) Tower.

From engineerguy. A look inside a quartz watch: how it keeps time.

From engineerguy. A short history of velcro.

From engineerguy. A brief description of the two main flows types — laminar and turbulent — and their uses by engineers.

From engineerguy. An early color photograph that uses a interference. It was invented by Gabriel Lippmann in the late 19th century.

From engineerguy. A description of the Bayer filter used to cover a CMOS or CCD camera.

From engineerguy.

From engineerguy. The Thunderstone, used as the base for a statute of Peter the Great in St. Petersburg, was moving on a novel rolling platform.

From engineerguy. The invention of the soft contact lens by Otto Wichterle.

From engineerguy. What’s inside a glow stick

From engineerguy. The magnetron from a microwave oven.

From engineerguy. A demonstration of the memory metal nitinol.

From engineerguy. Why a beverage can is cylinder and not a cuboid or a sphere.