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Astrophysics
Page 3
Questions (190)
Select the correct answer from the list. (1 point)
The (gravity/electromagnetic radiation) of dark matter causes baryonic gas and
4 answers
asked anonymously
62 views
what cuases a supernova
1 answer
asked anonymously
26 views
What lies at the center of the milky way galaxy?
1 answer
asked anonymously
80 views
Fill in the blank
To form a nebula blank pulls matter together or causes blank (Blank 1:Heat, pressure, gravity)(blank 2:
1 answer
asked anonymously
57 views
Where did the elements that are heavier than hydrogen and helium come from in the universe (one word)
1 answer
asked by
hello fart
40 views
Which are accurate statements about dark matter? Select the two correct answers.(1 point)
Responses Scientists have hypotheses
6 answers
asked by
sleepy
125 views
Select the correct answer from the list.(2 points)Dark matterabsorb light,emit radiation, andbeen observed directly.
1 answer
asked by
Taylor swift
45 views
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might
4 answers
asked by
StressedStudent
1,366 views
The mass of a certain neutron star is 2.0 x 1030 kg and its radius is 6,000 m (6 km). What is the acceleration of gravity at the
2 answers
asked by
lissa
1,318 views
What type of pressure supports a white dwarf from gravitational collapse?
Group of answer choices
1 answer
asked anonymously
32 views
What leads to a white dwarf?
Group of answer choices Planetary Nebulae All of the above Massive star death Supernovae
1 answer
asked by
Mark
36 views
If a star has a temperature twice as hot as the Sun's and a luminosity 32 times the Sun's, what is the ratio of its radius to
1 answer
asked by
Mark
38 views
If a star has a temperature twice as hot as the Sun's and a luminosity 32 times the Sun's, what is the ratio of its radius to
1 answer
asked by
Mark
44 views
Why do we see absorption lines from the Sun?
Group of answer choices The photosphere is cool enough to have atoms, which produce
1 answer
asked by
Mark
42 views
How is gravitational lensing related to dark matter?(1 point) Responses The gravity of dark matter absorbs light from distant
11 answers
asked anonymously
55 views
How do scientists know that dark matter exists?
1 answer
asked by
Blue
13 views
How do scientists know that dark matter exists?
(1 point) They notice that light seems to "disappear" in certain areas of
1 answer
asked by
Blue
23 views
The distance that light travels in 1 year (a light year) is 5.88 x 10^12 miles. If a star is 2.4 x 10^8 light years away, what
3 answers
asked by
Anonymous
1,090 views
Assume that the mass of a neutron star is 1.5 times that of the Sun and the radius of the neutron star is 10 km. Ignore effects
4 answers
asked by
Al
1,048 views
Certain neutron stars (extremely dense stars) are believed to be rotating at about 100 rev/s. If such a star has a radius of 10
2 answers
asked by
margaret
1,026 views
The mass of a star is 1.89·1031 kg and it performs one rotation in 28.9 days. Find its new period (in /days) if the diameter
2 answers
asked by
Bristol
988 views
The total power output of the Sun is about 3.8 × 1026 W, and the power-producing core has a radius of about 1.4 × 105 km
2 answers
asked by
mj
1,009 views
Select the correct answers from the list,
Dark matter does or does not I’m so bright does not. What does emit radiation and has
1 answer
asked anonymously
31 views
X-ray pulses from Cygnus X-1, a celestial x-
ray source, have been recorded during high- altitude rocket flights. The signals can
2 answers
asked by
sharon
917 views
1. What is a Black Hole,what are its parts and what does it do?
3 answers
asked by
Jimmy Boldt
890 views
Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a
2 answers
asked by
William
835 views
The sun has a mass of 1.99 × 1030 kg and is moving in a circular orbit about the center of our galaxy, the Milky Way. The
2 answers
asked by
Jennifer
1,138 views
A star of mass 2.0 1028 kg that is 1.6 1020 m from the center of a galaxy revolves around that center once every 3.4 108 years.
2 answers
asked by
winterWX
785 views
Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in
1 answer
asked by
Leila
694 views
What type of object will the Sun leave behind once it finished dying?
I know the answer is white dwarf, but what will its mass be
2 answers
asked by
aang
703 views
Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.725K. What is the peak wavelength in
1 answer
asked by
Leila
669 views
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the
1 answer
asked by
Mary
678 views
assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron
2 answers
asked by
Karon
686 views
If some external force were able to compress the sun, how would the sun react and why?
1 answer
asked by
Rose
618 views
A black hole is an object with mass, but no spatial extent. It truly is a particle. A black hole may form from a dead star. Such
3 answers
asked by
joy
618 views
Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand
1 answer
asked by
x
628 views
what type of spectrum does the sun emit?
where does nuclear fusion in the sun occur? if a star begins its evolution with 10 times
4 answers
asked by
bo
616 views
The sun has a raduis of 6.96*10^8m and a surface temperature of 5780K. How much power is radiating?
2 answers
asked by
Jessica
558 views
The force of
causes stars to form within stellar nebulas as it pulls atoms together, causing nuclear fusion to happen, generating
1 answer
asked anonymously
17 views
Find tha schwarzschild radius of tha earth ,whose mass 5.98×10^24kg
2 answers
asked by
M salman
534 views
Find the approximate gravitational red shift in 500 nm light emitted by a compact star whose mass is that of sun but whose
2 answers
asked by
poqw
530 views
What is dark matter? I mean it is not from school but the answer seems complicated, can someone answer this for me?
3 answers
asked by
IWanderedintospace
520 views
Suppose when we look in one half of the sky, the CMBR appears to be at a temperature of 2.72K. What is the peak wavelength in
2 answers
asked by
Leila
517 views
Consider a star with a mass of 8.7 x 1031 kg. Determine the radius of the star if a typical star has a density of 1400 kg/m3.
3 answers
asked by
Abby
504 views
it is estimated that light travels 100 000 years to travel the full distance across our galaxy, the milky way. If light travels
3 answers
asked by
Hafiza
510 views
The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is
1 answer
asked by
mj
507 views
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of
1 answer
asked by
Bob
511 views
other than astronomy would astronomers have to study in order to discover black holes?
2 answers
asked by
lexus
490 views
Solar material has a density of about 3*10^-4kg/m^3,and the amount of matter released in a typical CME is around 1*10^15kg.
1 answer
asked by
unknown
484 views
Black hole in X-Ray Binary.
An X-ray binary consists of 2 stars with masses (the accreting compact object) and (the donor). The
3 answers
asked by
Greco
495 views
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