Io's volcanoes contribute material to a ________ around the planet Jupiter's equator
Fill in the blank(s) with correct word
ring or torus-shaped cloud
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The peak wavelength in the continuous emission spectrum of a body is inversely proportional to its ____________________
Fill in the blank(s) with correct word
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.
Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms different isotopes of the same element?
A) Atom 1: nucleus with 6 protons and 8 neutrons, surrounded by 6 electrons; Atom 2: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons. B) Atom 1: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons; Atom 2: nucleus with 7 protons and 7 neutrons, surrounded by 7 electrons. C) Atom 1: nucleus with 8 protons and 8 neutrons, surrounded by 8 electrons; Atom 2: nucleus with 8 protons and 8 neutrons, surrounded by 7 electrons. D) Atom 1: nucleus with 4 protons and 5 neutrons, surrounded by 4 electrons; Atom 2: nucleus with 5 protons and 5 neutrons, surrounded by 4 electrons.
What size capacitor should be placed in series with a 30-? resistor and a 40-mH inductive coil if the resonant frequency of the circuit is to be 1.0 kHz?
A) 3.3 µF B) 0.63 µF C) 6.0 µF D) 4.5 µF E) 2.0 µF