A "galactic fountain" is _____
a. a stream of gas and dust being pulled into a galaxy as it forms
b. a jet of high-speed superheated material thrown out of the accretion disk around a black hole
c. a partial spiral arm formed by the collision of molecular clouds
d. a bubble of hot, metal-rich gas ejected from the disk by a burst of supernova
e. a stream of gas made from a star that has been torn apart while falling into a supermassive black hole
d
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What does the phenomenon of interference demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of the atomic orbitals D) the particle nature of the photon E) the process of ionization
The strong force is the force that
a. binds electrons to the nucleus in an atom. b. holds the moon in orbit around Earth. c. creates the magnetic field associated with sunspots. d. produces the extremely high temperatures in the solar corona. e. binds protons and neutrons together to form a nucleus.
You live in a Universe where matter dominates significantly over antimatter
a. True b. False Indicate whether the statement is true or false
The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with
What will be an ideal response?