User Abanob Ebrahim

5

26

votes

4

answers

5k

views

Why does the speed of sound decrease at high altitudes although the air density decreases?

Sep 16 '19 at 10:08 Farcher 64.2k

4

16

votes

2

answers

5k

views

If atoms never “physically” touch each other, then how does matter-antimatter annihilation happen?

particle-physics forces atomic-physics antimatter

Dec 9 at 1:38 Abanob Ebrahim 3,388

6

16

votes

4

answers

16k

views

Explanation for negative specific heat capacities in stars?

thermodynamics astrophysics stars

Nov 19 at 23:41 Community♦ 1

4

14

votes

1

answer

2k

views

Are the electrons at the centre of the Sun degenerate or not?

thermodynamics astrophysics electrons sun stars

May 2 '19 at 10:25 Community♦ 1

1

13

votes

1

answer

3k

views

What is the percentage of stars that are massive enough to end their lives in a supernova?

astrophysics stars supernova stellar-evolution

Jul 7 '14 at 0:18 Community♦ 1

5

11

votes

2

answers

430

views

Would a rocky planet orbiting so close to a very hot star eventually vaporize?

homework-and-exercises astrophysics planets thermal-radiation estimation

Oct 18 '15 at 0:28 Abanob Ebrahim 3,388

2

11

votes

2

answers

951

views

Where did the energy released due to gravitational binding energy of the Earth go?

gravity astrophysics earth thermal-radiation geophysics

Dec 13 '14 at 2:33 Thomas M 310

2

10

votes

1

answer

599

views

Does matter found at densities of white dwarfs “feel” more like a solid, liquid or gas?

astrophysics density plasma-physics states-of-matter white-dwarfs

Mar 12 '16 at 14:34 Rob Jeffries 87.8k

2

8

votes

4

answers

4k

views

What is the actual energy content of the Sun?

thermodynamics astrophysics sun stars

Aug 26 '17 at 13:02 asdasd 1

6

8

votes

5

answers

8k

views

Kinetic energy vs. momentum?

newtonian-mechanics forces energy energy-conservation work

May 27 '15 at 13:10 Community♦ 1

8

votes

1

answer

682

views

Would matter-antimatter annihilation create a fireball or not?

nuclear-physics radiation antimatter

Aug 14 '13 at 13:51 Community♦ 1

7

votes

1

answer

1k

views

How could this small nuclear reactor power two jet engines?

nuclear-physics power nuclear-engineering aircraft propulsion

Apr 11 '18 at 4:52 Franklin L Hayes 1

1

7

votes

2

answers

4k

views

How much of a galaxy's mass is in stars?

astrophysics stars dark-matter galaxies milky-way

Oct 20 '16 at 22:52 Community♦ 1

1

7

votes

2

answers

11k

views

What is the luminosity of the Milky Way galaxy?

astrophysics stars galaxies observational-astronomy milky-way

Nov 30 '14 at 12:06 Rob Jeffries 87.8k

1

7

votes

2

answers

1k

views

What is the percentage of useful energy do we get from matter-antimatter annihilation?

particle-physics energy nuclear-physics antimatter

Aug 11 '13 at 6:21 Community♦ 1

6

votes

2

answers

1k

views

Can the Sun's core be treated as an ideal gas?

thermodynamics astrophysics sun ideal-gas kinetic-theory

Jul 19 '18 at 19:14 Rob Jeffries 87.8k

6

votes

2

answers

1k

views

How much faster is the fusion we make on earth compared to the fusion that happens in the sun?

energy astrophysics stars fusion

Dec 23 '15 at 14:48 Rob Jeffries 87.8k

1

6

votes

3

answers

3k

views

What does this stellar mass distribution mean?

astrophysics stars galaxies observational-astronomy milky-way

Dec 14 '14 at 1:11 Rob Jeffries 87.8k

1

6

votes

1

answer

2k

views

How to calculate the kinetic energy of supernova ejecta?

kinematics astrophysics supernova

Sep 10 '14 at 1:26 Community♦ 1

1

5

votes

2

answers

342

views

How much of the Solar convection zone is completely ionized?

astrophysics atoms stars plasma-physics ionization-energy

Jun 5 at 9:37 Rob Jeffries 87.8k

1

5

votes

5

answers

6k

views

What causes damage, kinetic energy or momentum?

newtonian-mechanics energy momentum collision

Jan 12 at 23:22 billyandriam 113

1

5

votes

1

answer

1k

views

Gravitational binding energy of a white dwarf at Chandrasekhar limit?

gravity astrophysics stars supernova white-dwarfs

Mar 12 '16 at 14:41 Rob Jeffries 87.8k

3

5

votes

1

answer

818

views

Why do neutron stars have solid crusts?

astrophysics material-science stars neutrons neutron-stars

Nov 20 '15 at 17:16 Abanob Ebrahim 3,388

1

5

votes

2

answers

2k

views

What is the area of the sky that is covered by the Hubble Ultra Deep Field image?

astronomy galaxies observational-astronomy

Dec 16 '14 at 9:29 Rob Jeffries 87.8k

1

5

votes

1

answer

309

views

According to the initial mass function, should there be more brown dwarfs than red dwarfs?

astrophysics stars galaxies observational-astronomy brown-dwarfs

Nov 30 '14 at 23:59 Rob Jeffries 87.8k

5

votes

1

answer

346

views

What does a supernova look like at its peak luminosity?

electromagnetic-radiation radiation radioactivity supernova

Sep 1 '14 at 14:35 Kyle Kanos 23.2k

1

5

votes

3

answers

481

views

How would normal matter behave under conditions found in the core of the sun?

energy earth sun stars

Aug 29 '14 at 19:28 Community♦ 1

4

votes

2

answers

429

views

Did Usain Bolt really sustain 11 horsepower of exerted power during the 100 m sprint?

newtonian-mechanics energy fluid-dynamics drag power

Mar 17 '19 at 20:31 Community♦ 1

4

votes

2

answers

12k

views

Would a matter-antimatter explosion cause fallout?

nuclear-physics radiation antimatter fusion

Aug 18 '18 at 5:17 The_Sympathizer 11.7k

2

4

votes

3

answers

13k

views

In nuclear fusion reaction, what is the percentage of mass converted to energy?

particle-physics energy nuclear-physics mass-energy fusion

Dec 9 '15 at 19:45 Wayne 11

Stack Exchange Network

current community

your communities

more stack exchange communities

Next privilege

Next badge

73 Questions

Why does the speed of sound decrease at high altitudes although the air density decreases?

If atoms never “physically” touch each other, then how does matter-antimatter annihilation happen?

Explanation for negative specific heat capacities in stars?

Are the electrons at the centre of the Sun degenerate or not?

What is the percentage of stars that are massive enough to end their lives in a supernova?

Would a rocky planet orbiting so close to a very hot star eventually vaporize?

Where did the energy released due to gravitational binding energy of the Earth go?

Does matter found at densities of white dwarfs “feel” more like a solid, liquid or gas?

What is the actual energy content of the Sun?

Kinetic energy vs. momentum?

Would matter-antimatter annihilation create a fireball or not?

How could this small nuclear reactor power two jet engines?

How much of a galaxy's mass is in stars?

What is the luminosity of the Milky Way galaxy?

What is the percentage of useful energy do we get from matter-antimatter annihilation?

Can the Sun's core be treated as an ideal gas?

How much faster is the fusion we make on earth compared to the fusion that happens in the sun?

What does this stellar mass distribution mean?

How to calculate the kinetic energy of supernova ejecta?

How much of the Solar convection zone is completely ionized?

What causes damage, kinetic energy or momentum?

Gravitational binding energy of a white dwarf at Chandrasekhar limit?

Why do neutron stars have solid crusts?

What is the area of the sky that is covered by the Hubble Ultra Deep Field image?

According to the initial mass function, should there be more brown dwarfs than red dwarfs?

What does a supernova look like at its peak luminosity?

How would normal matter behave under conditions found in the core of the sun?

Did Usain Bolt really sustain 11 horsepower of exerted power during the 100 m sprint?

Would a matter-antimatter explosion cause fallout?

In nuclear fusion reaction, what is the percentage of mass converted to energy?