Tensile Strength, the ability of a material to withstand a pulling (tensile) force. It is customarily measured in units of force per cross-sectional area. For example, if a metal rod one square inch in cross section can withstand a pulling force of 1,000 pounds but breaks if more force is applied, the metal has a tensile strength of 1,000 pounds per square inch.
We first reported on the possibility of an invisibility cloak last year. Now a different invisibility cloak is making the news -- one that uses metamaterials to redirect light away from the wearer.
When a celebrity dies, it makes news, especially when there are questions about the cause. Are you steeped in the news of autopsy results and the mortality of famous people? Answer these questions to see if you know the real scoop.