What is the CNO cycle and how is it different from hydrogen fusion?
What will be an ideal response?
The CNO cycle is a kind of hydrogen fusion that uses up hydrogen faster than normal hydrogen fusion. This cycle requires a higher temperature for fusion and builds Carbon from Helium produced by hydrogen fusion.
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If the Sun instantaneously shrunk dramatically in size but retained the same mass, what would happen to the Earth?
A) Earth's orbit would be unchanged. B) Earth would gradually spiral into the shrunken Sun. C) Earth would be ejected from the solar system. D) Earth would be rapidly sucked into the shrunken Sun.
New rocks that have had their original form altered by heat and pressure, but without melting, are classified as
a. sedimentary. b. metamorphic. c. igneous. d. all of these.
What does the wavelength of the peak labeled 6 tell us about Mars?
A) its color B) its surface temperature C) its chemical composition D) its orbital speed
A test rocket is fired straight up from rest with a net acceleration of 20.0 m/s2. After 4.00 seconds the motor turns off, but the rocket continues to coast upward with no appreciable air resistance. What maximum elevation does the rocket reach?
A) 487 m B) 327 m C) 320 m D) 408 m E) 160 m