The speed of sound depends on the medium that the waves pass through, and is a fundamental property of the material. The first significant effort towards the measure of the speed of sound was made by Newton.
When the Occupational Safety and Health Act passed in 1970, steel-toe boots became a standard in the American workplace, preventing thousands of on-the-job injuries. Today's technology has only increased the variety of work boots available, and it's important to understand the differences before purchasing a pair.
J Toe. The J toe boot is the most pointed, with the tip tapered into a V-shape. This is considered the âclassicâ cowboy boot. These are not the most comfortable of boots, as the toes are very restricted.