Going on a road trip? The St. Louis Arch, Statue of Liberty and Golden Gate Bridge are great tourist sites. But if you prefer offbeat destinations, check out these roadside attractions and odd…
Don't Be So Touchy!Anatomy and PhysiologyThe SensesWindows to the SoulCan You Hear Me Now?The Nose KnowsDon't Be So Touchy! If you are still troubled by the idea of seven senses, how about this…
(Encyclopedia)
CE5
Steam engine
steam engine, machine for converting heat energy into mechanical energy using steam as a medium, or working fluid. When water is converted into steam it expands,…
(Encyclopedia) impotenceimpotenceimˈpətəns [key], inhibited sexual excitement in a man during sexual activity that, despite an unaffected desire for sex, results in inability to attain or maintain a…
(Encyclopedia) rickettsiarickettsiarĭkĕtˈsēə [key], any of an order (Rickettsiales) of very small microorganisms, many disease-causing, that live in vertebrates and are transmitted by bloodsucking…
(Encyclopedia) tunicatetunicatet&oomacr;ˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows…
WHAT IS MECHANICAL ADVANTAGE? HOW IS A MACHINE’S EFFICIENCY MEASURED? LEVERSPULLEYSINCLINED PLANESGEARSFIND OUT MOREFrom can openers to cranes, machines make work easier. Simple machines include…
