In the geology, the term "Precambrian" refers to
A) the eon immediately preceding the Phanerozoic eon
B) all eons preceding the Phanerozoic eon
C) the eon immediately preceding the Proterozoic eon
D) all eons preceding the Proterozoic eon
B
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The average rate of erosion on the Moon is far less than on Earth because:
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.
A current-carrying wire of length 52.0 cm is positioned perpendicular to a uniform magnetic field. If the current is 15.0 A and it is determined that there is a resultant force of 2.3 N on the wire due to the interaction of the current and field, what is the magnetic field strength?
a. 0.29 T b. 0.029 T c. 0.020 T d. 0.38 T e. 0.18 T
What is proper motion? How is it related to transverse velocity?
What will be an ideal response?
Phase changes occur with an attendant
A) convection. B) temperature decrease. C) temperature remaining constant. D) temperature increase.