Discuss the peculiar magnetic field of Uranus
What will be an ideal response?
Uranus never grew massive enough to capture large amounts of gas from the solar nebula as Jupiter and Saturn did, so it has much less hydrogen and helium. Its internal pressure is enough lower than Jupiter's that it should not contain any liquid metallic hydrogen. Models of Uranus based in part on its density and oblateness suggest that it has a small core of heavy elements and a deep mantle of partly solid water. Although referred to as ice, this material would not be anything like ice on Earth, given the temperatures and pressures inside Uranus. The mantle also contains rocky-composition material and dissolved ammonia and methane. Circulation in this electrically conducting mantle may generate the planet's peculiar magnetic field, which is highly inclined to its axis of rotation. Above this mantle lies a deep hydrogen and helium atmosphere.
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In the diagram, each resistor is 3 ohms and the battery is 9 volts. What is the current through the middle resistor?
A. 3 A to the right
B. 3 A to the left
C. 9 A to the right
D. 9 A to the left
E. 1 A to the left
What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s?
A) 1 m/s2 B) 2 m/s2 C) 3 m/s2 D) 4 m/s2 E) 5 m/s2
Stars on the upper left of the H-R diagram are longer lived than those on the lower right
Indicate whether the statement is true or false
The lobes of radio galaxies are perpendicular to their plane of rotation
Indicate whether the statement is true or false