Astronomers use roman numerals to indicate the ionization state of a gas. Ionized hydrogen is indicated by which of the following symbols?
A) H II
B) H2
C) H I
D)
E) H III
A
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Name the three subatomic particles that make up an atom and state their electrical charges
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Magnetic Field of a Long Wire: At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of Earth's magnetic field of about 5.0 × 10-5 T? (?0 = 4? × 10-7 T ? m/A)
A. 1.0 mm B. 1.0 cm C. 2.0 cm D. 3.0 cm E. 4.0 cm
What was the significance of the end of the era of nucleosynthesis, when the universe was about 5 minutes old?
A) The basic chemical composition of the universe had been determined. B) The proportions of dark matter and luminous matter had been determined. C) It marks the time at which the first stars formed. D) It marks the time at which the expansion of the universe had settled down to its current rate.
How does the death of one very massive star give birth to perhaps hundreds of smaller ones soon thereafter?
What will be an ideal response?