The first steps of evolution off the main sequence are the same for both medium-mass and high-mass stars
a. True
b. False
Indicate whether the statement is true or false
True
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The splitting of a large nucleus into two smaller nuclei upon absorbing a neutron is nuclear fusion
a. True b. False Indicate whether the statement is true or false
The analysis of Martian meteorites found on the Earth show that they contain
A) only tantalizing hints of possible life. B) fossilized remains of multi-cellular insects. C) fossilized remains of small, mammal-like creatures. D) bacteria with DNA very different from bacteria on Earth. E) bacteria with DNA closely related to bacteria on Earth.
The Sun reaches its most southern point at the _____
A) vernal equinox B) winter solstice C) summer solstice D) autumnal equinox
When a steady voltage is across one-half as much resistance, the current
A) is half. B) remains the same. C) is doubled. D) is quadrupled.