Components: If a vector 
has components Ax < 0, and Ay < 0, then the angle that this vector makes with the positive x-axis must be in the range
A. 0° to 90°.
B. 90° to 180°.
C. 180° to 270°.
D. 270° to 360°.
E. It cannot be determined without additional information.
Answer: C
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According to our present theory of solar system formation, how did Earth end up with enough water to make oceans?
A) The water was brought to the forming Earth by planetesimals that accreted beyond the orbit of Mars. B) The water was mixed in the other materials in the planetesimals that accreted at our distance from the Sun. C) The water was formed by chemical reactions among the minerals in the Earth's core. D) Earth formed in the relatively narrow region of the solar nebula in which liquid water was plentiful.
What is the approximate density of the Sun's core?
A. 16 g/cm3 B. 160 g/cm3 C. 1.6 g/cm3 D. 1600 g/cm3
In an isolated battery (not connected to an electrical circuit),
A) there are excess electrons on the positive terminal but no excess of protons on the negative terminal. B) there is no excess of electrons or protons on either terminal. C) there are excess protons on the negative terminal and excess electrons on the positive terminal. D) there are excess electrons on the negative terminal and excess protons on the positive terminal. E) there are excess electrons on the negative terminal but no excess protons on the positive terminal.
The energy used for "minor" uses adds up to truly gigantic amounts
What will be an ideal response?