- Snoqualmie Falls is a roaring 268-foot tall cascade that falls in more or less one unbroken drop into the Snoqualmie River below. Other waterfalls in the Pacific Northwest are taller, but the 100-foot width of Snoqualmie’s precipice sets it apart. The imposing falls have captivated residents of the valley for hundreds of years. The falls are surrounded by a 2-acre park with two viewing platforms. Located about 30 miles east of Seattle, Snoqualmie Falls is a refreshing spot to visit in the summer but can be equally spectacular in winter when covered in icicles. Just be careful to get there early—the site can be packed with visitors on weekends when the weather is beautiful.
- Bohr model (Wikipedia)
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom, presented by Niels Bohr and Ernest Rutherford in 1913. It consists of a small, dense nucleus surrounded by orbiting electrons. It is analogous to the structure of the Solar System, but with attraction provided by electrostatic force rather than gravity, and with the electron energies quantized (assuming only discrete values).