A ball thrown horizontally from a point 24 m above the ground strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown? (in this problem use g = 10 m/s2)
A) 7.40 m/s
B) 6.10 m/s
C) 8.96 m/s
D) 8.13 m/s
E) g
D
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Identify a true statement about carbonaceous chondrites
A) They contain significant amounts of hydrogen. B) They have not changed since they formed. C) They are mostly composed of nonvolatile compounds. D) They do not provide information about the early Solar System.
Molecular Speeds: A flask contains a mixture of argon and neon gases at a stabilized temperature. The root-mean-square speed of the argon gas is determined to be 1.21 km/s. What is the root-mean-square speed of the neon gas? The atomic mass of argon is 39.95 g/mol, and that of neon is 20.18 g/mol.
Fill in the blank(s) with the appropriate word(s).
Jupiter does not have
a. a hot interior. b. convection occurring in its atmosphere. c. crustal plates on its surface. d. a dynamo effect. e. any rings.
The Local Group of galaxies is dominated by the presence of spiral galaxies
a. True b. False Indicate whether the statement is true or false