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- Aircraft (13315 bytes)
9: ==Categories and classification==
11: Aircraft fall into two broad categories:
15: ...ground). Helicopters and autogyros use a spinning rotor (a ''rotary wing'') to provide both lift and thru...
18: ...er as ships float on the water. In particular, these aircraft use a relatively low density gas such a...
24: Below, we describe classifications by design, propulsion and usage. - Helicopter (20080 bytes)
1: ...] and propelled by one or more large horizontal [[rotor]]s ([[propeller]]s). Helicopters are classified ...
5: ...any location, and land anywhere with a clearing a rotor disk and a half in diameter.
9: ...EVAC]], and [[search and rescue|air/sea/mountain rescue]]), [[police]] and civilian surveillance, carr...
13: ...u Tau" was [[4th century AD]] book in China that described some of the ideas in a rotary wing aircraft...
15: ...d (in March [[1946]]) for use in the [[United States]]. - Kite flying (5612 bytes)
1: ...ichi01.jpg|thumb|250px|right|Yokaichi Giant Kite Festival held on the fourth Sunday every May in [[Hig...
2: '''Kite flying''' is the [[hobby]] of flying kites.
3: ...tes, below, for a list of different types and styles.
5: ==Types==
6: ...re abrasive and able to sever the competitor's kites. Such practice is dangerous since the abrasive st... - Hydrogen (20221 bytes)
18: <td>[[Chemical series]] </td><td>[[nonmeta...
22: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td><td>0.0899 [[kilogram per cubic metre|...
24: ... </td><td align="center">colorless<br />[[Image:H,1.jpg|125px|]]</td></tr>
26: ...r="#a0ffa0"><font color="green">'''Atomic properties'''</font></th></tr>
44: ..."#a0ffa0"><font color="green">'''Physical properties'''</font></th></tr> - Flagellum (8951 bytes)
2: ...; 55 micrometres in length. Function: in humans, responsible for movement of spermatozoa.
4: ...or ''undulipodia'' to emphasize their distinctiveness.
8: ...h the [[lipopolysaccharides]], [[P ring]] associates with [[peptidoglycan]] layer, M ring is imbedded ...
10: ...], but with a filament attached usually only reaches 200 to 1000 rpm.
12: ... bacterial flagella may have evolved from such pores. - Centrifuge (2358 bytes)
1: [[image:centrifugetesttube_small.jpg|thumb|150px|A laboratory centrifug...
3: ... of centrifuges, often for very specialised purposes.
5: == History and predecessors ==
9: ... and allowing the observation of sedimentation rates for [[macromolecule]]s, allowed for the determina...
12: == Different types and uses == - Wind power (27669 bytes)
1: ...tricacies of large-scale deployment of wind turbines to generate [[electric power|electricity]].
3: ...x|Map of available wind power over the United States. This type of undetailed map is most useful for s...
9: ...t of this wind energy can be found at high altitudes where continuous wind speeds of over 160 km/h (10...
11: ...ceive less energy from the sun than the equator does, but dry land heats up (and cools down) more quic...
17: ...ch converts some of that power into torque on the rotor. The amount of power transferred depends on the ... - Steam engine (17867 bytes)
1: ...locomotive]] trains and [[steam ships]], and were essential to the [[Industrial Revolution]]. They are...
3: ...ushes against a piston or turbine, whose motion does the work to turn the wheels.
9: ... steam engine to power the first commercially successful [[steamship]].
11: ... [[vacuum]] of condensing steam, whereas later types (such as [[steam locomotive]]s) used the power of...
15: ...mp piston that moves the water, through check valves, to the top of the shaft.
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