A laser beam of wavelength λ=632. 8 nm shines at normal incidence on the reflective side of a compact disc. The tracks of tiny pits in which information is coded onto the cd are 1. 60 μm apart.

The volume of a cylinder is 72 tt cm3. if the radius is 3 cm, what is the height of the cylinder?

Pest analysis, a framework for understanding different facets of the world in which a business operates, looks particularly at political, social, and technological factors.

In 1919, the temperance movement finally succeeded. they secured ratification of a constitutional amendment (the that banned alcoholic beverages. prohibition began with the 1920 passage of the which enforced the amendment.