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1 de mar. de 2011 · It has long been established that fleas jump by storing and releasing energy in a cuticular spring, but it is not known how forces from that spring are transmitted to the ground. One hypothesis is that the recoil of the spring pushes the trochanter onto the ground, thereby generating the jump.
15 de sept. de 2009 · Our encounters with fleas are now thankfully limited to the unwanted infections of our pets, but for most mammals and birds they remain a continual annoyance. There are about 2000 species of fleas that suck the blood of a wide variety of hosts, each adapted to their own ecological niche.
21 de mar. de 2011 · Using high-speed recording equipment and sophisticated mathematical models, Professor Malcolm Burrows and Dr Gregory Sutton from the University's Department of Zoology, were able to prove that fleas use their toes to push off and propel themselves into the air, resolving the 44 year old mystery.
Momentum is a 2005 studio album by American jazz saxophonist Joshua Redman's Elastic Band. [7] The album was released on 24 May 2005 by Nonesuch label. All compositions are original works by Redman unless otherwise noted.
Momentum, a measure of the motion of an object, is calculated by multiplying an object's mass by its velocity. A change in momentum occurs with any change in an object's mass or velocity - though in most physics problems, it is the velocity that changes.
14 de feb. de 2011 · By Matt Kaplan. February 14, 2011. • 2 min read. It was no small task, but researchers have solved a long-term mystery—how fleas jump. Now high-speed video (watch above) confirms the insects take...
The energy store in the flea occurs at just that point at which the winged ancestor might have been expected to have a wing; it is tempting to suggest that the jumping mechanism of the flea is a specialization of the conventional flight mechanism of a higher insect.
