The average distance from Earth to the Sun is
a. 1 ly.
b. 1 million km.
c. 1 million miles.
d. 1 billion km.
e. 1 AU.
e
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Exoplanetary systems containing "hot Jupiters"—extremely massive planets orbiting very close to their parent stars—do not look like our own solar system. Are they inconsistent with the condensation theory of solar system formation? Explain
What will be an ideal response?
A seismograph
A) predicts earthquakes. B) measures ground movement. C) helps prevent earthquakes. D) measures fault displacement.
Terminal Voltage and Internal Resistance: A battery you buy at the store has an internal emf of 3.0 V. If it has an internal resistance of 14.0 ?, that current will this battery put out if it is short-circuited?
A. 0.21 A B. 42 A C. 4.7 A D. 130 A
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm
What can we conclude? A) The star is moving toward us. B) The star is moving away from us. C) The star is getting hotter. D) The star is getting colder. E) The "star" actually is a planet.