Which of the following is not a strong argument for the theory that some large elliptical galaxies formed as the result of galaxy collisions?
A) Elliptical galaxies dominate the population in dense galaxy clusters.
B) Some ellipticals have stars and gas that rotate opposite to the rest of the galaxy.
C) Some elliptical galaxies are surrounded by shells of stars.
D) Computer simulations predict that the product of a galaxy collision is generally an elliptical galaxy.
E) Galaxy collisions are common and most galaxies in the universe are elliptical.
E
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The _________________ hypothesis includes mergers with smaller galaxies and infalling gas to the standard formation of the Milky Way galaxy
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As the sloped surface supporting a shoe becomes steeper
A) the shoe's weight mg remains unchanged. B) the normal force becomes less. C) friction needed to keep it at rest increases. D) all of the above E) none of the above
How much heat, in joules, is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (Lice = 333 J/g; Lsteam = 2.26 × 10^3 J/g.)
a. 3.35 × 10^5 b. 4.19 × 10^5 c. 2.36 × 10^6 d. 2.69 × 10^6 e. 3.01 × 10^6
Which of these elements had to be made in a supernova explosion?
a) calcium b) uranium c) oxygen