If an interstellar gas cloud shrinks in size, what does the law of conservation of energy predict it will do?
A) heat up
B) spin slower
C) cool off
D) continue shrinking
E) spin faster
A) heat up
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What is the name of the nearest large spiral galaxy to our own Milky Way, in the Local Group?
A: The Large Magellanic Cloud. B: The Small Magellanic Cloud. C: The Sagittarius Dwarf. D: The Andromeda Galaxy. E: The Virgo Cluster.
A coaxial cable consists of an inner cylindrical conductor of radius R1 = 0.040 m on the axis of an outer hollow cylindrical conductor of inner radius R2 = 0.080 m and outer radius R3 = 0.090 m
The inner conductor carries current I1 = 4.40 A in one direction, and the outer conductor carries current I2 = 7.70 A in the opposite direction. What is the magnitude of the magnetic field at the following distances from the central axis of the cable? (?0 = 4? × 10-7 T ? m/A) (a) At r = 0.060 m (in the gap midway between the two conductors) (b) At r = 0.150 m (outside the cable)
In the context of life in the universe, which of the following discoveries of astronomy suggests that the processes that formed life on Earth could have occurred elsewhere?
A) the universe is very old B) the laws of physics are the same everywhere C) the universe is very large D) the chemical elements that make up life on Earth are common
The Moon and Sun are approximately the same physical size
Indicate whether the statement is true or false