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.
The History of Independence Day. On July 4, 1776, the thirteen colonies claimed their independence from England, an event which eventually led to the formation of the United States. Each year on July 4th, also known as Independence Day, Americans celebrate this historic event. Conflict between the colonies and England was already a year old when the colonies convened a Continental Congress in Philadelphia in the summer of 1776.