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.
Features of an alloy toe: 1  An alloy toe is made from aluminum, titanium or a combination of lightweight metals. 2  Alloy toes are 30%-50% lighter than steel toes. 3  The toe box can be larger with an alloy toe because an alloy toe can be made a little thinner than other safety toes.