What is a superbubble?
A) a very low-density region of interstellar space, formed by the merger of supernova remnants
B) a region filled with hot gas from a single supernova explosion
C) It is another name for the large volume of space in the galaxy's halo.
D) It is the roundish region cleared out by the expanding gas of a planetary nebula.
E) a dense cloud of gas that can form many new stars
A) a very low-density region of interstellar space, formed by the merger of supernova remnants
You might also like to view...
If the north celestial pole appears on your horizon, what is your latitude?
a. 90° N b. 90° S c. 0° d. 45° N e. The latitude of the observer cannot be determined from the information given.
Power: A series ac circuit has a reactance of 11 k? due to its capacitance, a reactance of 3 k? due to its inductance, and a resistance of 29 k?. What is the power factor of this circuit?
A. 0.96 B. 0.27 C. 1.04 D. 0.48
To achieve a high equivalent resistance for a pair of resistors, connect them in
A) series. B) parallel. C) either of these
Reactance: At what frequency will the inductive reactance of a 44-mH inductor be equal to the capacitive reactance of a 27-pF capacitor?
Fill in the blank(s) with the appropriate word(s).