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- Seismograph (4037 bytes)
2: ...k]] ''seismos'' = earthquake and ''graphein'' = write) are used by [[seismology|seismologist]]s to rec...
8: ...and [[seismometer]] are usually interchangeable, with seismometer now having the more common useage.
16: ...onal observatory is best when mounted on bedrock with an uncracked connection to a continental plate. ...
18: ...ee-axis observatory in a small field or amateur unit.
20: ...vides a computer with an inexpensive analog-to-digital converter. - Copper (13595 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->{| border="1" cellpadding="2" cellsp...
20: | [[transition metal]]s
25: | [[Density]], [[Mohs hardness scale|Hardness]]
34: | 63.546 [[Atomic mass unit|amu]]
63: | 1357.6 [[Kelvin|K]] (1984.3 ?[[Fahrenheit|F]]) - Radar (16746 bytes)
2: ... [[diameter]]) rotates on a track to observe activities near the [[horizon]].]]
3: ...]] and [[rain]]. Strong [[radio]] waves are transmitted, and a receiver listens for any [[echo_(phenom...
5: ...s, and then amplified many times. Thus radar is suited to detecting objects at very large ranges where...
11: ...ch as [[metal]], making radar particularly well suited to the detection of [[aircraft]] and [[ship]]s.
15: ... in order to improve their detection in a rescue situation. For generally the same reasons objects att...
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