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.
And although the signing of the Declaration was not completed until August, the 4th of July has been accepted as the official anniversary of United States independence. The 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.