How many MeV of energy is released during a reaction in which 1.67 × 10-25 kg of material is converted to energy? (c = 3.0 × 108 m/s, 1 eV = 1.67 × 10-19 J)
A) 5.0 × 10-14 MeV
B) 4.1 × 10-7 MeV
C) 3.1 × 10-4 MeV
D) 9.4 × 104 MeV
D
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Newton's second law states: sum of forces = mass × acceleration. If a known force was applied to an object with a known mass, how would you predict that object's acceleration?
A) acceleration = mass × sum of forces B) acceleration = sum of forces / mass C) acceleration = mass / sum of forces D) Newton's second law is irrelevant for solving this problem.
As rising air cools, its ability to accommodate water vapor decreases so the
A) relative humidity of the rising air decreases. B) adiabatic rate stabilizes. C) air becomes more wet. D) relative humidity of the rising air increases.
Which air mass has greater air pressure?
A) warm air B) cold air C) adiabatic air D) expanding air
The Moon rises later each day because ________.
A. the Moon follows an elliptical orbit around Earth B. Earth moves approximately one degree per day in its orbit around the Sun C. the Moon moves in its orbit faster than Earth rotates D. the Moon shifts eastward relative to the stars in its orbit around Earth E. None of these choices is correct.