○○○ ARPANET ⪢⪢
Funded by the US department of defence and developed by universities, this host-to-host network connection called ARPANET, a
direct ancestor of the Internet, was the first of its kind. #it
http://qindex.info/i.php?x=14820
○○○ 0850± Scandinavia ⪢⪢
During the 9th century, Scandinavia in northern Europe is populated by, among others, the Vikings, excellent sailors who explore in all
directions to plunder but also to develope trade routes. #bookmark
http://qindex.info/i.php?x=5285
○○○ plunge ⪢⪢
These incidents, many caught on video over the past 2 decades, show U.S. military encounters with shadowy objects that seem capable of traveling upwards at 11,000 miles per hour, changing
direction and plunging into water without slowing down. #bookmark
http://qindex.info/i.php?x=15559
○○○ 2022.03.28 ⪢⪢
Ukraine's President Volodymyr Zelenskyy signals willingness to compromise while Russia's foreign minister says
direct talks between the Russian and Ukrainian presidents would be "counterproductive".
http://qindex.info/i.php?x=15449
○○○ each ⪢⪢
In this example, we're asked to estimate the number of degrees each of the shaded figures has been rotated and state the
direction of the rotation.
#math
http://qindex.info/i.php?x=20619
◌◌◌ Space
By stringing an infinite number of lines along a dimension perpendicular to the line, a two-dimensional object called a plane can be obtained. And then if we string an infinite number of planes in either
direction, we get three dimensional space.
http://qindex.info/i.php?x=5178
• Cross Product
Given two nonzero vectors in two or three dimensions, their cross product is a vector with magnitude equal to the product of the magnitudes of the vectors times the sine of the angle between the vectors and
direction perpendicular to the vectors.
http://qindex.info/i.php?x=5291
◌◌◌ Plane
By stringing an infinite number of lines along a dimension perpendicular to the line, a two-dimensional object called a plane can be obtained. And then if we string an infinite number of planes in either
direction, we get three dimensional space.
http://qindex.info/i.php?x=5031
