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dmckee --- ex-moderator kitten
  • Member for 11 years, 7 months
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125 votes
Accepted

What is a field, really?

121 votes

Am I attracting Pluto?

79 votes
Accepted

Why can't energy be created or destroyed?

77 votes
Accepted

Nuclear Fusion: Why is spherical magnetic confinement not used instead of tokamaks in nuclear fusion?

60 votes

How can a black hole produce sound?

54 votes
Accepted

Why do physicists assume that dark matter is weakly interacting?

54 votes
Accepted

Why is the ampere a base unit and not the coulomb?

52 votes
Accepted

How did physicists know that there are two kind of charges?

52 votes
Accepted

Why is a laserpointer able to "erase" a glow-in-the-dark sticker?

51 votes

Why do the neutrinos (with mass) from a supernova arrive before the light (no mass)?

46 votes
Accepted

Virtual vs Real image

44 votes
Accepted

Fundamental question about dimensional analysis

42 votes
Accepted

What's the difference between centre of mass & centre of gravity for massive bodies?

41 votes
Accepted

Does a photon in vacuum have a rest frame?

40 votes
Accepted

Why was the first discovered neutrino an anti-neutrino?

40 votes
Accepted

Why is force a vector?

39 votes
Accepted

Why do electrons occupy the space around nuclei, and not collide with them?

37 votes

How to learn physics effectively and efficiently

36 votes
Accepted

Will 1 gram of matter moving at relativistic speeds completely annihilate a larger quantity of stationary antimatter?

35 votes
Accepted

How would an X-ray scanner identify a mirror?

34 votes

How can muons travel faster than light through ice?

33 votes
Accepted

Why should the back of a parabolic mirror be painted black?

32 votes

Given that the atomic orbitals are fuzzy, why are the energy levels and energy transitions sharp?

32 votes
Accepted

Why is the (free) neutron lifetime so long?

32 votes
Accepted

How is the speed of nucleons in the nucleus measured?

32 votes

Could speed of light be variable and time be absolute?

30 votes

In electrostatics, why the electric field inside a conductor is zero?

30 votes
Accepted

What exactly do we see on the famous neutrino image of the sun?

29 votes

Why do spacecrafts take off with rockets instead of just ascending like an aircraft until they reach space?

29 votes

Why is normal force perpendicular?

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