Centaurus A is the closest lobe radio galaxy, and may be a collision between a spiral and an elliptical galaxy
Indicate whether the statement is true or false
TRUE
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What do quasars tell us about the past of the Universe?
What will be an ideal response?
The very earliest Greek cosmological theory, several centuries before Ptolemy, stated that
A) the planets revolve in loop-the-loops [circles within circles] around Earth. B) the entire universe is in reality just the inside of a giant cosmic frog. C) the planets go in simple circles around the sun. D) the planets go in simple circles around Earth. E) the planets revolve in loop-the-loops around the sun.
In an excited hydrogen atom, the electron is in the 4d state
If this atom is in an external magnetic field, what are the smallest and largest possible angles between the orbital angular momentum and the direction of the magnetic field (or any other direction, for that matter)?
The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 4, there will be how many permitted orbital magnetic quantum numbers allowed?
a. 3 b. 4 c. 8 d. 9 e. 16