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.
America celebrates July 4 as Independence Day because it was on July 4, 1776, that members of the Second Continental Congress, meeting in Philadelphia, adopted the final draft of the Declaration of Independence.merica celebrates July 4 as Independence Day because it was on July 4, 1776, that members of the Second Continental Congress, meeting in Philadelphia, adopted the final draft of the Declaration of Independence.