Which statements about the magnetic fields of Uranus and Neptune is FALSE?
A) Neither fits the Dynamo model very well.
B) Uranus' field is tilted 60 degrees off its already tilted rotational axis.
C) Neptune's field is tilted 47 degrees to its more conventional rotational axis.
D) Both pass directly through the cores of their planets, like all other fields.
E) Both may have ammonia water replacing the liquid metallic hydrogen.
D
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Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
A. the pressure is inversely proportional to the volume at constant temperature. B. the temperature is directly proportional to the volume at constant pressure. C. the temperature is directly proportional to the pressure at constant volume. D. all the statements above are found to be correct. E. only statements (a) and (b) are found to be correct.
The galactic halo or corona is believed to contain mostly
a. O and B stars. b. G, K, and M stars. c. open clusters. d. globular clusters. e. dark matter.
A parallel-plate capacitor has plates of area 0.40 m2 and plate separation of 0.20 mm
The capacitor is connected across a 9.0-V potential source. (?0 = 8.85 × 10-12 C2/N ? m2) (a) What is the magnitude of the electric field between the plates? (b) What is the capacitance of the capacitor? (c) What is the magnitude of the charge on each plate of the capacitor?
How many times must a dip in the brightness of a star be seen in order to detect a planet with the transit technique?
A) 1 time B) 2 times C) 3 times D) 4 times