List the terrestrial planets in increasing order of their size.
A. Mercury, Venus, Earth, Mars
B. Mercury, Mars, Venus, Earth
C. Venus, Earth, Mars, Mercury
D. Earth, Mars, Venus, Mercury
Answer: B
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The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed into the page, the direction of the magnetic field at P is closest to the direction of
A. E. B. F. C. G. D. H. E. A.
The low-pressure center of a hurricane is called the ______________
Fill in the blank(s) with correct word
A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves upward with constant velocity?
A) The period does not change. B) The period increases. C) The period decreases. D) The period becomes zero. E) The period increases if the upward acceleration is more than g/2 but decreases if the upward acceleration is less than g/2.
The mass density of normal air is, at a particular temperature,
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
A. 
B. 
C. 
D. 
E. 
F. 