The nearest naked-eye star to our Sun, Alpha Centauri, is still over a parsec distant
Indicate whether the statement is true or false
TRUE
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Because the Hubble constant has a value of 70 km/s/Mpc, a galaxy 50 Mpc away would have a recession velocity of _______________ km/s. (Round your answer to the nearest 1 km/s)
Fill in the blank(s) with correct word
When an electron in an atom goes from a higher energy state to a lower energy state, the atom
A) absorbs a photon of a specific frequency. B) can absorb a photon of any frequency. C) emits a photon of a specific frequency. D) absorbs several photons of a specific frequency. E) can emit a photon of any frequency.
The equivalent capacitance of the circuit shown below is
a.
0.2 C.
b.
0.4 C.
c.
1 C.
d.
4 C.
e.
5 C.
Careful studies of Earth’s magnetic field for the past 330 million years shows that it has _____________ many times.
Fill in the blank(s) with appropriate word (s)..