the light we see form the sun comes form which layer
photosphere
the temperature of the layer of gas that produces the visible light of the sun is
5,800 k
why coudn't you stand on the surface of the sun
the sun doesn't have a solid surface
how many planet earths could fit inside the sun
a little over 1 million
the densitiy of the sun is most familiar to which object
jupiter
the area in the sun's atmosphere located above the chromosphere (1,500-10,000km) where the temperature rises dramatically is called the
transition zone
about what percent of the incoming energy from the sun reaches earths surface
50-70%
the solar constant is measure of
the energy received by the sun at the location of earth
the luminosity of the sun is a measureof
the total energy emitted by the sun in all directions
from inside out, which is in the correct order for the structure of the sun
radiative zone,convective zone, chromosphere
RCC
by what mechanism does solar energy reach the sun's pohtosphere from the layer just underneath it
convection
hydrostatic equilibrium in our sun is the balance between
gravitation and pressure
the vibrations of the sun reveal information about
the interior structure of the sun
what two energy transport mechanisms, in order from outside the core to the surface is found in the sun
radiative difussion, covection
what is the size of a typical granule or convection cell seen in the photosphere
1,000 km
the pattern of rising hot gas cells all over the photosphere is called
granulation
the outwad pressure of hot gas in the sun.....
is balanced by the inward gravitational pressure
when the chromosphere can be seen during a solar eclipse, it appears
red
from where does most of the solar wind flow
coronal holes
what is it about the sun's corona that astronomers don't understand
the corona is much hotter than layers of the sun that are closer to the solar interior
when we glimpse the chromosphere at the start and end of totality, its color is
red, due to ionized hydrogen at lower pressure
the percentage by mass of the sun is hydrogen is about...
71%
the percetnage by number of atoms of the sun that is hydrogen is about
91%
the percentage by mass of the sun is helium is about...
27%
a loop of gas follwoing the magnetic field lines between sunspots is a
prominence
how long does the sunspot cycle las, on average
between 25-35 days
sisible sunspots lie in the...
granulation in the photosphere
as the sun rotates, an individual sunspot can be tracked across its face, from eastern to western limb this takes about
two weeks
the most striking example of solar variablity was the
Maunder Minimum from 1645-1715
sunspots...
come in pairs, representing the north and south magnetic fields
sunspots are dark splotches on the sun, which implies
they are extremely hot, but cooler than the sorrounding areas of the sun
how would sunspots appear if you could magically removed them from the sun
they would shine bright orange inc olor, like Arcturus
while observing the sun, you note a large number of sunspots, what can you conclude...
there are likely to be an above average number of flares and prominances
the numbers of sunspots and their activity peak about every
11 years
loops of glowing hydrogen seen hanging over the solar limb during totality are
prominences
during a period of high solar activity, the corona
is more irregular
the solar winds blow outward from
coronal holes
which of these are not associated with the active sun
granulation
suppose a large flare is detected optically, how long until radio interference arrives...
simultaneously
which of the following is NOT a property of neutrinos
cannot interact at all with normal matter
the critical temperature the core must reach for a star to shine by fusion is
10 million Kelvin
in the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen..what happens to the "lost" mass
it is converted to energy
the primary source of the sun's energy is...
the strong force fusing hydrogeninto helium
in the proton-proton cycle, the positron is ...
an anti-electron
what natural barrier tries to prevent two protons from combining
electromagnetic repulsion
the critical temperature to initiate proton-proton cycle in the cores of stars is...
10 million kELVIN
WHICH is the net result of the proton-proton chain?
4protons=1helium4+2neutrinos+gamma rays
the speed of light 2.00*10E8. If 2.00kg is converted to energy, how much energy will be produced
using E=mc^2
1.80*10E17