The lowest temperature possible in nature is
A) 0 degrees C.
B) -273 degrees C.
C) 4 K.
D) none of the above
Answer: B
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Parallel-Plate Capacitor: The plates of a parallel-plate capacitor are maintained with constant potential by a battery as they are pulled apart. During this process, the amount of charge on the plates
A. must increase. B. must decrease. C. must remain constant. D. could either increase or decrease. There is no way to tell from the information given.
What is the wavelength of a 1-hertz electromagnetic wave?
A) less than 1 m B) 1 m C) more than 1 m
The current definition of the standard second of time is based on
A) the frequency of radiation emitted by cesium atoms. B) the earth's rotation rate. C) the duration of one year. D) the oscillation of a particular pendulum kept in France.
An airplane of mass 1.2 × 10^4 kg tows a glider of mass 0.6 × 10^4 kg. The airplane propellers provide a net forward thrust of 5.4 × 10^4 N. What is the glider's acceleration?
a. 2.0 m/s2 c. 6.0 m/s2 b. 3.0 m/s2 d. 9.8 m/s2