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For Kalfree Only!!!! - 21843
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Wed 07 Aug, 2013 (11:08am)
Wed 07 Aug, 2013
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The fundamental building block for all matter, which is the smallest representative sample of a substance that maintains chemical identity, is called
a chemical compound.
If the Hubble telescope detects an intensely bright region in the sky that lasts only a few days, it has probably found evidence of a
main sequence star.
In 1808, which person below borrowed the name 'atom' from Greek writings and described in a modern way how it is that an atom is indivisible?
Why do astronomers currently prefer orbiting telescopes over Earth-based telescopes?
lower user costs and more research time options
exciting space travel possible for observations
wider range of electromagnetic wavelengths detected
greater international cooperation
more aesthetically pleasing
Which region of the electromagnetic spectrum can easily reach a telescope on the earth's surface?
Each time an electron moves from a higher energy level to a lower energy level
a photon is absorbed.
an electron is absorbed.
an observer will not see any light.
an electron disappears as some point between two levels.
a photon or some heat is given off.
Which of the following satellite observatories is used to examine the collision of neutron stars?
Chandra X-ray Observatory
Hubble Space Telescope (HST)
Femi Gamma Ray Telescope
Giant Magellan Telescope
Democritus put forth the concept of an atom because
of experimental evidence from his laboratory.
older ideas that he borrowed from Egyptians.
he observed rocks turning into pebbles and then turning into sand.
his invention of the magnifying glass led him to think about progressively smaller particles.
it was philosophically satisfying that there would ultimately be a size limit on particles.
From what part of the electromagnetic spectrum is most of the Sun's energy emitted?
visible light waves
The total collection of photons emitted by an atom is called its
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Human Resource Management
Object Oriented Programming
Statistics and Probability