Is Prof. Stephen Hawking on Quora

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Particle Physics
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Answer Physics Science


52.6m followers
If space is a vacuum, then why doesn't it suck in all the air from
Earth's atmosphere? Relativity (physics)
827.8k followers
M. Scott Veach, studied at Stanford University
Updated May 4 2017 · Featured on HuffPost and 2 more · Upvoted by Frederic Rachford, PhD Gravity
Physics, Case Western Reserve University (1975) and Mike Jarvis, Professional astrophysicist 1.4m followers
Author has 135 answers and 702.4k answer views
Quantum Mechanics
Actually, the answer to this is interesting. And while gravity is most certainly a real 1m Followers
thing, the answer to this question is not "because gravity is stronger." The actual answer Astrophysics
is that the vacuum o ... (more) 660.3k followers

Energy (physics)
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Answer Physics
Theoretical Physics
Why do most scientists insist that nothing can travel faster than the 403.1k followers
speed of light?
Chemistry
Valentin Ghincolov, Amateur astronomer passionate about Relativity and physics 4.8m followers
Updated Dec 8 2018 Upvoted by Léon van Heijkamp, ​​Ph.D. Physics, Delft University of
Technology (2010) and Gerben Wierda, M.Sc. Physics & Computer Science, University of Mathematics and Physics
Groningen (1988) Author has 191 answers and 1m answer views 41.1k followers

I will make this clear to you, I promise. Please have little patience and read this because I Waves (physics)
will explain it very clearly and in simple intuitive terms. Speed ​​is not the problem, it is 250.9k followers

the accelera ... (more) Speed ​​of Light


350.3k followers

Electromagnetism
Answer · Physics 237k followers
How can a beam of light travel around the Earth roughly 7 times in a Cosmology
second and a neutron star can supposedly rotate 1,000 times in a 515.8k followers
second? Wouldn't the rotational speed of the neutron star exceed the
Force (physics)
speed of light? 9.3k followers
Alex Fleming, Graduate Research Assistant at Texas A&M University (2016-present) View 31 More
Updated Feb 22 Upvoted by Andy Buckley, PhD in particle physics, visiting researcher at CERN,
lecturer in physics and David Vanderschel, PhD Mathematics & Physics, Rice (1970) Author has
106 answers and 616.8k answer views
Actually, that is a very astute observation. The reason we know that a neutron star CAN
spin up to 716 times in a second is because we have measured this in the fastest spinning
pulsar on record - P ... (more)

Answer Physics
Why hasn't the world had another Einstein? It's been over a hundred
years since the theory of relativity and the closest we have had is
Hawking.
Viktor T. Toth, Information Technology Professional (1979 - present)
Answered Apr 21 2017Upvoted by Andy Buckley, PhD in particle physics, visiting researcher at
CERN, lecturer in physics and Bibhusit Tripathy, MSc Physics, Kalinga University Raipur (2019)
Author has 6.6k answers and 45.7m answer views

With all due respect to Stephen Hawking whom I admire, he is not the “closest we have
had ”to Einstein. His contributions are signi fi cant to be sure, but to a considerable
extent, his fame is due t ... (more)
Answer Physics
Can you be shot from so far away that the bullet loses enough energy
and the shot does not break skin and just hurts?
Zephaniah Iorizzo, former General Assistant at De Anza Properties (2017-2018)
Updated Nov 15 2018 Upvoted by Jeremy Lim, PhD Physics, Singapore University of Technology
and Design (2022) Author has 203 answers and 337k answer views

Yes. I read an account of some dude on a Navy ship at sea that


was near some country in the middle of unrest. Someone
somewhere on mainland decided to take pot shots at the ships
in the distance wit ... (more)

Answer Physics
How do physicists view the everyday world much di erently than
most other people?
Rory Coker, Professor of Physics at The University of Texas at Austin (1966 - present)
Answered Oct 3, 2018 · Upvoted by Richard Muller, Prof Physics, UCBerkeley, author of "Now—
The Physics of Time "(2016) and Stephen Selipsky, ex-particle theorist; Stanford Ph.D., research
at CERN, BU, YaleAuthor has 2.6k answers and 581.4k answer views
Richard Feynman: “I have a friend who's an artist and has sometimes taken a view
which I don't agree with very well. He'll hold up a fl ower and say 'look how beautiful it
is, 'and I'll agree. Then ... (more)

Answer Physics
Is it possible for light to have no movement or speed or is it always
"required" to move?
Luxi Turna, Prisoner of Sex
Updated Mar 19, 2019 Upvoted by Léon van Heijkamp, ​​Ph.D. Physics, Delft University of
Technology (2010) Author has 835 answers and 644.1k answer views
Almost nobody realizes this, but light doesn't move. It sits at
the same invariant 4D location, and mass speeds past it at c,
toward future time. (Per Feynman, mass is just momentum in
the directio ... (more)

Answer Physics
How do I become as intelligent as Richard Feynman?
William Brandler, scientist
Answered Jan 28, 2019 Upvoted by Frederic Rachford, PhD Physics, Case Western Reserve
University (1975) and Thorstein Wang, M.Sc Nanotechnology & Physics, Norwegian University of
Science and Technology (2019)

Feynman’s sister told a story about how in middle of the night Richard said, ‘Joan wake
up, I want to show you something ’He led her down to a golf course and told her to look
up. There was an auror ... (more)

Answer Physics
Paper is white because it re fl ects all light, and mirrors re fl ect all light,
so why don't they look the same?
Bill Otto, former Principal Engineer, Lasers and Electro-optics at Boeing (1994-1997)
Updated May 21, 2017 Upvoted by Paul Carter, Master's Science & Microbiogy, U. Sou. Ms and
Marcio Cabral de Moura, M.Sc. Physics, Federal University of Pernambuco (1997) Author has
2.7k answers and 6m answer views

I assume that since you asked on Quora, you would like the real
answer and not the one they teach in school. This is a very
good question, because a fl at specular mirror reflects all colors
of ligh ... (more)

Answer Physics
If the Earth were cubic in shape, what would happen when you walk
over an edge?
Glen Helgeland, studied Robotics at Swinburne University of Technology
Updated Mar 22, 2019 Upvoted by Ron Davis, Ph.D. in theoretical physics, worked in it 43 years
and David Tregurtha, PhD Physics, University of Bath (2014) Author has 353 answers and
735.3k answer views

You would step on to the next side. You would also be using a
lot of climbing gear, and wearing a space suit. Let me explain. If
the earth was a cube, with the same mass as the more
traditional ball ... (more)

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