Recent work with type I supernovae at great distances suggests the universe may in fact be accelerating its expansion, a discovery attributed to a newly found:
A) repulsive charge on dark matter.
B) polarization and a universal spinning magnetic field.
C) dark energy.
D) magnetic field associated with antimatter.
E) mass determined for the neutrinos.
C
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Remembering that each set of dots is separated by the same time interval, where on its elliptical path will the planet be traveling the fastest?
Sgr A* is believed to be the center of the Milky Way galaxy because I. It lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way. II. Long wavelength dust penetrating images show it to be a region crowded with stars III. Orbits of stars around it indicate a mass several million times that of the Sun within a volume a few
light hours in size IV. Radio observations show it is a concentrated source at the center of swirling clouds of gas a. I & II only b. II & III only c. I & IV only d. II & IV only e. All of I, II, III, & IV
Angular and Linear Quantities: A string is wound tightly around a fixed pulley having a radius of 5.0 cm. As the string is pulled, the pulley rotates without any slipping of the string. What is the angular speed of the pulley when the string is moving at 5.0 m/s?
A. 100 rad/s B. 50 rad/s C. 25 rad/s D. 20 rad/s E. 10 rad/s
Granite does not readily form near oceanic-oceanic convergent boundaries because
A) granite forms from granitic magma and most oceanic material is basaltic in origin. B) the magma formed at this type of boundary is not conducive to producing granitic type rocks. C) oceanic-oceanic convergence often results in the eruption of andesitic lavas. D) all of the above