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.
Confidence votes 51. The most notable difference is that composite toe shoes don't set off metal detectors and are generally lighter than steel toe shoes. A steel toe shoe has a piece of steel inside the tip (about 2 1/2 inches) to protect the toes from being crushed if a heavy object falls on the foot.