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.
Staying in Back Bay. Wander around this quintessential neighborhood in the heart of Boston for high-end shops, restaurants, and the feeling of city bustle. Its most identifiable skyscrapers, the Prudential Center and John Hancock Tower, are highlights of the city skyline. Visit Newbury street to explore unique and trendy boutiques â as well as every other kind of store imaginable â all housed in beautiful brownstone buildings.