MAC1501 ASSIGNMENT 6 SEMESTER 2 2024
Sunspots appear darker then their surroundings because they - (ANSWER)Are cooler than their
surroundings
What is solar wind? - (ANSWER)A stream of shared particles flowing outward from the surface
of the Sun
How does the number of neutrinos passing though your body at night compare with the number
passing through your body during the day? - (ANSWER)About the same
Which of these star clusters is oldest - (ANSWER)A cluster whose brightest main-sequence stars
are yellow
If the Star Alpha Centauri were moved to a distance 10 times farther than it is now, its parallax
angle would - (ANSWER)Get smaller
X-ray images of the Sun generally show the - (ANSWER)Corona
Listed following are events or phenomena that occur during either the part of the sunspot cycle
known as solar minimum or the part known as solar maximum. Match these items to the correct
part of the sunspot cycle. - (ANSWER)Solar Maximum:
-Occurs about 11 years after a solar maximum (on average)
-Solar flares are most common
-Auroras are most likely in Earth's skies
-Sunspots are most numerous on the Sun
-Orbiting satellites are most at risk
Solar Minimum:
-Occurs about 5 to 6 years after a solar maximum (on average)
, Energy balance in the Sun refers to a balance between... - (ANSWER)The rate at which fusion
generates energy in the Sun's core and the rate at which the Sun's surface radiates energy into
space
Before we can use parallax to measure the distance to a nearby star, we first need to know... -
(ANSWER)The Earth-Sun distance
Which of the following is a valid way of demonstrating parallax for yourself? - (ANSWER)Hold
up your hand in front of your face, and alternately close you left and right eyes
What is the cause of seller parallax? - (ANSWER)Earth's orbit around the Sun
The more distant a star, the.... - (ANSWER)smaller its parallax angle
Approximately what is the parallax angle of a star that is 20 light-years away? - (ANSWER)0.16
arcsecond
Suppose that a star had a parallax angle of exactly 1 arc second. Approximately how far away
would it be, in light-years? - (ANSWER)3.3 light-years away
Which of the following best explains why nuclear fusion requires bringing nuclei extremely
close together? - (ANSWER)Nuclei normally repel because they are all positively charged and
can be made to stick only when brought close enough for the strong force to take hold.
Compared to a main-sequence star with a short lifetime, a main-sequence star with a long
lifetime is... - (ANSWER)Less luminous, cooler, smaller, and less massive
Compared to a high-luminosity main-sequence star, stars in the upper right of the H-R diagram
are - (ANSWER)Cooler and larger in radius
Sunspots appear darker then their surroundings because they - (ANSWER)Are cooler than their
surroundings
What is solar wind? - (ANSWER)A stream of shared particles flowing outward from the surface
of the Sun
How does the number of neutrinos passing though your body at night compare with the number
passing through your body during the day? - (ANSWER)About the same
Which of these star clusters is oldest - (ANSWER)A cluster whose brightest main-sequence stars
are yellow
If the Star Alpha Centauri were moved to a distance 10 times farther than it is now, its parallax
angle would - (ANSWER)Get smaller
X-ray images of the Sun generally show the - (ANSWER)Corona
Listed following are events or phenomena that occur during either the part of the sunspot cycle
known as solar minimum or the part known as solar maximum. Match these items to the correct
part of the sunspot cycle. - (ANSWER)Solar Maximum:
-Occurs about 11 years after a solar maximum (on average)
-Solar flares are most common
-Auroras are most likely in Earth's skies
-Sunspots are most numerous on the Sun
-Orbiting satellites are most at risk
Solar Minimum:
-Occurs about 5 to 6 years after a solar maximum (on average)
, Energy balance in the Sun refers to a balance between... - (ANSWER)The rate at which fusion
generates energy in the Sun's core and the rate at which the Sun's surface radiates energy into
space
Before we can use parallax to measure the distance to a nearby star, we first need to know... -
(ANSWER)The Earth-Sun distance
Which of the following is a valid way of demonstrating parallax for yourself? - (ANSWER)Hold
up your hand in front of your face, and alternately close you left and right eyes
What is the cause of seller parallax? - (ANSWER)Earth's orbit around the Sun
The more distant a star, the.... - (ANSWER)smaller its parallax angle
Approximately what is the parallax angle of a star that is 20 light-years away? - (ANSWER)0.16
arcsecond
Suppose that a star had a parallax angle of exactly 1 arc second. Approximately how far away
would it be, in light-years? - (ANSWER)3.3 light-years away
Which of the following best explains why nuclear fusion requires bringing nuclei extremely
close together? - (ANSWER)Nuclei normally repel because they are all positively charged and
can be made to stick only when brought close enough for the strong force to take hold.
Compared to a main-sequence star with a short lifetime, a main-sequence star with a long
lifetime is... - (ANSWER)Less luminous, cooler, smaller, and less massive
Compared to a high-luminosity main-sequence star, stars in the upper right of the H-R diagram
are - (ANSWER)Cooler and larger in radius
