 Endothermic reaction
Descrição do Vídeo:
a cool science experiment showing how two chemicals
put toogether can suck up all the energy from the water
to do what it does...WATCH!
Data: November 25, 2008
Palavras Relacionados: COLD SCIENCE ENERGY
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JMDMT 1766 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection - melting in
the atmosphere (similar to those observed in deep sea
CSs; see [8]) by indigeneous water released from the
dehydration of the constituent phyllosilicates of their
parent interplanetary dust particles. Another
possibility could be partial recondensation of the
vapor liberated from the heated (and melted) particle.
The fairly high amounts of residual water measured in
the host spherules agree with these interpretations,
and it seems unlikely that the spherules were formed
before capture by the Earth. Such residual
Data: November 23, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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JMDMT 709 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection - an attempt
to evaluate the meteorite compositions. The
thermogravimetric patterns and the differential thermal
curves of chlorites are characterized by two high
temperature dehydration effects; see Mielenz, Schieltz
and King,-'' and Nutting.-* Serpentine (antigorite),
seems to show only one principal, dehydration reaction
at high temperatures. Certain chlorites, containing 2
polymorphic (14A and 7 A) units, had been observed to
exhibit 3 high temperature, dehydration effects.
Montmorillonite may give complicated patterns; in most
m
Data: November 21, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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8-2-1
Descrição do Vídeo:
A pot of water at room temperature is placed on a hot
stove. If 5000 calories of heat is transferred, q for the
pot of water is ______ and q for the stove is ______.
A. +5000 calories, +5000 calories
B. 5000 calories, -5000 calories
C. +5000 calories, -5000 calories
D. 5000 calories, +5000 calories
Data: October 22, 2008
Palavras Relacionados: 8-2-1 Chemistry heat transfer endothermic exothermic
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Birds in the garden - United colors of Birds
Descrição do Vídeo:
Birds in the garden - United colors of Birds sparrow
Birds (class Aves) are bipedal, endothermic
(warm-blooded), vertebrate animals that lay eggs. There
are around 10,000 living species, making them the most
diverse tetrapod vertebrates. They inhabit ecosystems
across the globe, from the Arctic to the Antarctic. Birds
range in size from the 5 cm (2 in) Bee Hummingbird to the
2.7 m (9 ft) Ostrich. The fossil record indicates that
birds evolved from theropod dinosaurs during the Jurassic
period, around 150200 Ma (million years ago), and the
earliest known bird is the Late Jurassic Archaeo
Data: October 19, 2008
Palavras Relacionados: Birds in the garden United colors of sparrow Aquatisch Vogel Kat Hond Hamster Insect Konijn Reptiel Dieren het wild
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