A report on an experiment designed to demonstrate that the radius r of a thin-walled, rigid-body cylinder, when neglecting friction, has no effect upon the velocity of the center of mass vcm of the cylinder down an inclined plane of constant angle q.
1,700 words (approx. 6.8 pages), 2 sources, 2000, $ 55.95
From the Paper "This is accomplished by showing that vcm of the cylinder is a function of gravity g down an inclined plane and the height h of the inclined plane, unaffected by the radius of the cylinder as given in the equation
vcm = (gh)1/2
The lab is an original comprehensive work with a full theoretical background of derived equations, and tables and graphs displaying all pertinent experimental data. "
Abstract Perhaps as much as any other technology in American history, the cotton gin shaped the nation's economic, social, and political development. The paper shows that, although many people associate the cotton gin with only the South, its importance to the nation's other regions is evident. It describes how Eli Whitney's creation brought about not only an explosion in Southern cotton production but also led to the expansion of racial slavery throughout the region.
From the Paper "A major impact upon the economy was the country's sudden dependence upon cotton production. As a result of the cotton gin, many communities were forced, without prior notice, to depend on the price and abundance of a single crop (202). When the cotton industry was down, so was the economy of these communities. When the cotton industry was up, farmers rushed to turn a profit and often overproduced the crop. As a result, the economy would falter when the price of cotton would drop."
Abstract This paper explains that the first known bathtub was found in Greece in the great palace of Knossos and included impressive technologies that provided water for the tub, including a system of interlocking terra-cotta pipes. The author believes that the function of the bathroom needs to be pushed to a new extreme, allowing people, spaces, and domestic functions new potentials for hybrid activities. The paper relates that a complete home plumbing system requires three distinct networks of pipes: water supply lines, which carry water under pressure; a network of drain pipes, which works entirely by gravity; and a network of pipes, which serves to maintain equal air pressure throughout the drainpipe so that the flow proceeds without interference.
Table of Contents
Introduction
History of Bathing
Evolution of Sanitation
History of Water Closets
Environmental Aspects
Public Health Aspects
Basic Components of Modern Bathrooms
Toilet or Flush
Sinks
Tubs and Showers
Storage
Ventilation
Natural Lighting
Special Effects with Plants
Appropriate Plants for the Bath
Hydroponics
Spirituality
Landscape of Bathing and Relaxing
Metroscape
Artificial versus Real
The New Landscape in Metro Area
Water Supply Service
Purification
Boosting by Pump
Boosting by Pressure Cylinder Water Pump
Drainage
Vents and Traps
The Ideal Living, the Bathroom in New Product Design Context
The Future of the Bathroom Is Here
From the Paper "In fact, until the mid-nineteenth century, streets were used as refuse dumping grounds, domestic animals roamed the streets and rodents ran rampant. Cesspools were located near houses and buildings, reeking and spreading germs. The Industrial Revolution and discoveries such as the germ theory brought about major changes in approach, raising the standard of living and ending serious epidemics. By 1900, improved nutrition, better sanitation, and, especially, contributions from bacteriologists increased life expectancy at birth by almost six years to age 47.3."
