Machines make work easier by changing the force on an object. Work occurs when an individual applies force to an object, and when a machine is used, the machine applies the force to the object instead of the individual.
Machines can also reduce the amount of time it takes to perform an action by increasing the amount of force to an object. One example of a simple machine is a pair of pliers. When the two large ends of the pliers are squeezed together, the smaller ends come together to apply a greater force to cut through an object. This force is greater than an individual could pinch.Learn More
Claudius Ptolemaeus, who lived around 100 to 178 A.D. and is more popularly known as Ptolemy, is believed to have invented the first world map. However, cave paintings and ancient maps that pre-date Ptolemy are considered attempts to create maps to help people define and navigate the world.Full Answer >
Charles F. Brush of Cleveland, Ohio, was the first person to use wind to power energy sources in the winter of 1887. He used the wind turbine around his home to power cellular batteries that were in the basement of his mansion, creating the first recorded electrical use of wind power.Full Answer >
Walter Sammons invented an improved version of the standard comb for enhanced hair straightening, and he received the patent for the heated comb to aid in removing kinks from hair. Sammons, from Philadelphia, received this patent, number 1,362,823, on Dec. 21, 1920. Sammons lived from 1890 until 1973.Full Answer >
The invention of the first tablet PC, or personal computer, is credited to three men: Alan Kay, Steve Jobs and Bill Moggridge. Computer specialist Kay created the concept for the tablet PC in the early 1960s, which he called the Dynabook, but need technical expertise to build the product. Technical enthusiast Jobs analyzed Kay’s product in the 1970s, and lent a hand in determining the components needed to build the machine.Full Answer >