Astronomy and physics education research and comments, field-tested think-pair-share (peer instruction) clicker questions, flashcard questions, in-class activities (lecture-tutorials), current events questions, backwards faded scaffolding laboratories, Hake gains, field-tested multiple-choice and essay exam questions, indices of discrimination, presentation slides, photos, ephemerae, astronomy in the marketplace, unrelated random sketches and minutiae.
20060726
The garbage disposal effect
http://www.spacetelescope.org/videos/html/heic0211d.html
NASA/European Space Agency, and Felix Mirabel (French Atomic Energy Commission, and the Institute for Astronomy and Space Physics/Conicet of Argentina)
Astronomy 10 learning goal Q10.3
Short movie clip dramatizing the behavior of the black hole and companion star that comprise "microquasar" GRO J1655-40.   The "garbage disposal effect" is where material will fly up and out of the drain of a garbage disposal while operating, and is a crude analog of the bipolar jets emitted by the black hole.
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