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.
Select another year-range: Polandâs National Independence Day marks the anniversary of the countryâs independence in 1918. It is celebrated as a nationwide holiday on November 11 each year. Spectators watch an Independence Day parade in Gdansk, Poland. Spectators watch an Independence Day parade in Gdansk, Poland.elect another year-range: Polandâs National Independence Day marks the anniversary of the countryâs independence in 1918. It is celebrated as a nationwide holiday on November 11 each year. Spectators watch an Independence Day parade in Gdansk, Poland. Spectators watch an Independence Day parade in Gdansk, Poland.