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Top Questions
27
votes
Why does the speed of sound decrease at high altitudes although the air density decreases?
fluid-dynamics
waves
acoustics
density
air
asked Sep 12, 2019 at 9:47
physics.stackexchange.com
25
votes
How can a dictatorship government be beneficial to a dictator in a post-scarcity society?
government
politics
far-future
post-scarcity
dictatorship
asked Jul 8, 2019 at 1:14
worldbuilding.stackexchange.com
25
votes
Size of Viking armies and raiding parties in 9th-10th centuries?
vikings
early-medieval
asked Apr 30, 2015 at 0:32
history.stackexchange.com
24
votes
Explanation for negative specific heat capacities in stars?
thermodynamics
astrophysics
stars
asked Oct 21, 2014 at 20:15
physics.stackexchange.com
16
votes
If atoms never "physically" touch each other, then how does matter-antimatter annihilation happen?
particle-physics
forces
atomic-physics
antimatter
asked Aug 10, 2013 at 11:56
physics.stackexchange.com
15
votes
Are the electrons at the centre of the Sun degenerate or not?
thermodynamics
astrophysics
electrons
sun
stars
asked Jul 2, 2015 at 18:42
physics.stackexchange.com
13
votes
What is the percentage of stars that are massive enough to end their lives in a supernova?
astrophysics
stars
supernova
stellar-evolution
asked Jul 6, 2014 at 21:29
physics.stackexchange.com
12
votes
What is the actual energy content of the Sun?
thermodynamics
astrophysics
sun
stars
asked Oct 21, 2014 at 15:48
physics.stackexchange.com
12
votes
Where did the energy released due to gravitational binding energy of the Earth go?
gravity
astrophysics
earth
thermal-radiation
geophysics
asked Dec 12, 2014 at 20:22
physics.stackexchange.com
11
votes
Would a rocky planet orbiting so close to a very hot star eventually vaporize?
homework-and-exercises
astrophysics
planets
thermal-radiation
estimation
asked Aug 19, 2015 at 0:07
physics.stackexchange.com
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Top Answers
18
Density of the Sun
physics.stackexchange.com
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