A charged balloon illustrates that something can have a great amount of
A) potential energy and a low voltage.
B) voltage and a small potential energy.
C) both voltage and potential energy.
D) none of the above
Answer: B
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The oxygen molecule (O2) may be regarded as two masses connected by a spring. In vibrational motion, each oxygen atom alternately approaches, then moves away from the center of mass of the system. If each oxygen atom of mass m = 2.67 × 10^-26 kg has a vibrational energy of 6.4 × 10^-21 J and the effective spring constant is 50 N/m, then what is the amplitude of oscillation of each oxygen atom?
a. 3.2 × 10^-11 m c. 1.1 × 10^-11 m b. 1.6 × 10^-11 m d. 8.0 × 10^-12 m
If a cool dry day was followed by a warm humid day, you might expect they resulted from which of the following consecutive air masses?
A) maritime tropical (mT) followed by continental polar (cP) B) maritime polar (mP) followed by maritime tropical (mT) C) continental polar (cP) followed by maritime tropical (mT) D) continental tropical (cT) followed by continental polar (cP)
A rock is thrown downward from an unknown height above the ground with an initial speed of 10 m/s. It strikes the ground 3.0 s later. Determine the initial height of the rock above the ground
a. 44 m b. 14 m c. 74 m d. 30 m e. 60 m