If a fire truck's siren is rising in pitch, it must be approaching us
Indicate whether the statement is true or false
TRUE
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The ____ of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles
a. aurora b. magnetosphere c. hydrosphere d. corona e. Schwarzschild radius
Mafic characteristics
What will be an ideal response?
As a 4-10 solar mass star leaves the main sequence on its way to becoming a red supergiant, its luminosity
A) decreases. B) first decreases, then increases. C) increases. D) remains roughly constant. E) first increases, then decreases.
The observed evidence we have for black holes includes
A) X-rays that are thought to come from the center of a black hole. B) visible light that is thought to come from the center of a black hole. C) temperature measurement of certain extremely cold stars that are thought to be black holes. D) X-rays that are thought to come from gases that are outside of a black hole. E) observations of certain regions of space, larger than the largest known stars, that emit no light.