Lift an object against the force of gravity if you want to judge its
A) mass.
B) weight.
C) both the same
D) none of the above
Answer: B
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A pressure of 10.0 mm Hg is measured using a constant-volume gas thermometer at a temperature of 50.0°C. What is the pressure (in mm Hg) at the zero-point temperature?
A. 31.8 B. 11.8 C. 8.45 D. 54.6 E. 68.3
Why is Pluto now considered to be a Kuiper-belt object?
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Why does Earth have an ultraviolet-absorbing stratosphere, while Venus and Mars do not?
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Equipotentials are lines along which
a. the electric field is constant in magnitude and direction. b. the electric charge is constant in magnitude and direction. c. maximum work against electrical forces is required to move a charge at constant speed. d. a charge may be moved at constant speed without work against electrical forces. e. charges move by themselves.