The fact that current carrying loops experience a net torque in a magnetic field is the principle behind the electric motor, where the electrical energy involved in establishing a current is converted into the mechanical energy of rotating a shaft.
From 1776 until the present day, July 4th has been celebrated as the birth of American independence, with typical festivities ranging from fireworks, parades and concerts to more casual family gatherings and barbecues. Play video Declaration of Independence. Play video History of the Fourth of July.
Independence Day is the national holiday of the United States of America commemorating the signing of the Declaration of Independence by the Continental Congress on July 4, 1776, in Philadelphia, Pennsylvania.At the time of the signing the US consisted of 13 colonies under the rule of Englandâs King George III.he first Independence Day celebration took place the following year â July 4 1777. By the early 1800s the traditions of parades, picnics, and fireworks were established as the way to celebrate Americaâs birthday.