An isothermal process means that the temperature of the gas does not change during the expansion or compression. An isobaric process means that the pressure of the gas does not change while in an isovolumetric (isochroic) process the volume remains constant.
The Liberty Bell is an iconic symbol of American independence, located in Philadelphia, Pennsylvania. Formerly placed in the steeple of the Pennsylvania State House (now renamed Independence Hall), the bell today is located in the Liberty Bell Center in Independence National Historical Park.T]he Liberty Bell is the most venerated object in the park, a national icon.
No one knows why the crack originally appeared. The Liberty Bell weighs more than a ton (approximately 2,080 pounds). It is made of 70 percent copper, 25 percent tin and small amounts of lead, zinc, arsenic, silver and gold. The Liberty Bell is a powerful symbol of the idea of freedom. It was rung at the first public reading of the Declaration of Independence in Philadelphia on July 8, 1776.