The idea that squeezing crystals has electrical consequences is not new. A phenomenon called piezoelectricity, which is exploited in pressure sensors and quartz watches, involves creating a voltage between the ends of a piece of crystal by applying pressure.
The John Hancock Center was completed in 1970, and its gently sloping black steel form remains one of the most-recognizable structures in Chicagoâs famed skyline. John Hancock Center The John Hancock Center (centre building) on North Michigan Avenue in Chicago. Â© Chicago Architecture Foundation A bold form was chosen for the Hancock Center. The tapered rectangular tubeâwith giant trusses on each of the four sidesâreadily shows how the building is supported.
Thomas Hancock founded and owned the House of Hancock, a trading company that imported goods from Britain and exported American goods to Britain. After Johnâs father died in 1744 he was sent to live with his uncle and wife who did not have children and treated John as their own child. John was a natural businessman and expanded his uncleâs wealth. Hancockâs political career started in the mid 1760âs as a protege protÃ©gÃ© Of Samuel. adams