User Carl Brannen

34 votes

7 answers

43k views

Why do tsunami waves begin with the water flowing away from shore?

asked Mar 11, 2011 at 21:05

23 votes

2 answers

3k views

How do horseshoe orbits work?

gravity celestial-mechanics

asked Apr 9, 2011 at 20:20

22 votes

3 answers

2k views

Long time deviations from exponential decay in radioactivity

quantum-mechanics nuclear-physics radioactivity

asked Mar 16, 2011 at 4:38

18 votes

3 answers

702 views

Why were space physicists wrong about the location of the heliopause?

space solar-system plasma-physics

asked Jan 26, 2011 at 23:32

15 votes

6 answers

29k views

Resistor circuit that isn't parallel or series

electricity electric-circuits electrical-resistance electrical-engineering

asked Mar 12, 2012 at 5:36

13 votes

4 answers

723 views

Is there an easy way to show that $x^2-t^2=1/g^2$ for a (relativistic) body undergoing acceleration g?

special-relativity acceleration relativity

asked May 17, 2012 at 5:33

13 votes

6 answers

16k views

Are water waves (i.e. on the surface of the ocean) longitudinal or transverse?

classical-mechanics waves water

asked Mar 8, 2011 at 0:29

10 votes

8 answers

1k views

Gravity theories with the equivalence principle but different from GR

general-relativity gravity equivalence-principle

asked Mar 9, 2011 at 4:00

10 votes

1 answer

7k views

How does one prove Fierz identities?

quantum-field-theory fermions

asked Mar 6, 2011 at 0:49

9 votes

2 answers

606 views

Addition of Angular Momementa in deeply bound situations, proton spin crisis

quantum-mechanics angular-momentum quantum-spin protons

asked Jan 22, 2011 at 22:02

7 votes

2 answers

1k views

What is the formula for the relativistic ellipse?

special-relativity

asked Mar 13, 2011 at 12:55

6 votes

5 answers

836 views

What Would be the Experimental Signature of Composite Leptons?

particle-physics experimental-physics

asked Mar 14, 2011 at 21:43

5 votes

2 answers

283 views

CPT violation and how could quark masses differ from anti-quark masses?

particle-physics experimental-physics cpt-violation

asked Mar 17, 2011 at 2:36

5 votes

2 answers

7k views

How deep in the ocean can a ping-pong ball go before it collapses due to pressure?

pressure

asked Apr 18, 2011 at 22:21

5 votes

3 answers

5k views

If an atom is fully ionized by removing all electrons, is it still an atom?

atoms electrons terminology ions

asked Jun 29, 2011 at 3:45

5 votes

2 answers

334 views

Products of Gaussian stochastic process variables

quantum-mechanics signal-processing statistics probability

asked Aug 11, 2011 at 18:34

5 votes

1 answer

503 views

For which irreps can normalized spin vectors be chosen continuously, for all possible spins?

quantum-mechanics quantum-spin

asked Jan 17, 2011 at 22:50

5 votes

8 answers

779 views

Is relativity necessary for the existence of life?

general-relativity special-relativity universe biophysics post-newtonian

asked Jan 20, 2011 at 5:42

5 votes

4 answers

304 views

Are Newton's gravity waves detectable by a laser interferometer?

gravity newtonian-gravity interferometry

asked Apr 7, 2011 at 1:47

4 votes

3 answers

2k views

The complementary variable to the qubit and spin-1/2

quantum-information quantum-spin heisenberg-uncertainty-principle

asked Feb 2, 2011 at 5:34

4 votes

2 answers

321 views

Why are the lighter halogens gases?

thermodynamics physical-chemistry chemical-compounds

asked Feb 3, 2011 at 23:57

4 votes

5 answers

566 views

Could ball lightening be a form of plasma?

electromagnetism plasma-physics

asked Feb 11, 2011 at 3:24

4 votes

3 answers

621 views

Does throwing a watch into the air cause it to gain or lose time?

general-relativity special-relativity

asked Apr 9, 2011 at 20:38

4 votes

2 answers

733 views

Can the earth's magnetic field be generated by heat from a natural nuclear reactor?

nuclear-physics geophysics convection

asked Mar 16, 2011 at 3:39

3 votes

2 answers

612 views

How much radiation exposure in the US was caused by the 105 nuke tests in the Pacific?

nuclear-physics nuclear-engineering

asked Mar 17, 2011 at 3:31

3 votes

2 answers

544 views

How does slow anti-hydrogen annihilate with normal matter in the lab?

antimatter casimir-effect

asked Mar 14, 2011 at 3:33

3 votes

1 answer

2k views

What is the exponential form gamma matrix for a general rotation and boost?

special-relativity dirac-equation

asked Mar 13, 2011 at 12:51

3 votes

3 answers

3k views

Could life survive a pole shift caused by an asteroid collision?

classical-mechanics thermodynamics angular-momentum rotational-dynamics

asked Feb 1, 2011 at 0:06

3 votes

4 answers

796 views

What restricts the value of weak hypercharge from being 5/3?

particle-physics

asked Feb 15, 2011 at 23:01

3 votes

2 answers

503 views

What is the quantum / Berry-Pancharatnam phase for a spin-j state with z-component m?

quantum-mechanics mathematical-physics quantum-spin berry-pancharatnam-phase

asked Jan 20, 2011 at 5:17

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41 Questions

Why do tsunami waves begin with the water flowing away from shore?

How do horseshoe orbits work?

Long time deviations from exponential decay in radioactivity

Why were space physicists wrong about the location of the heliopause?

Resistor circuit that isn't parallel or series

Is there an easy way to show that $x^2-t^2=1/g^2$ for a (relativistic) body undergoing acceleration g?

Are water waves (i.e. on the surface of the ocean) longitudinal or transverse?

Gravity theories with the equivalence principle but different from GR

How does one prove Fierz identities?

Addition of Angular Momementa in deeply bound situations, proton spin crisis

What is the formula for the relativistic ellipse?

What Would be the Experimental Signature of Composite Leptons?

CPT violation and how could quark masses differ from anti-quark masses?

How deep in the ocean can a ping-pong ball go before it collapses due to pressure?

If an atom is fully ionized by removing all electrons, is it still an atom?

Products of Gaussian stochastic process variables

For which irreps can normalized spin vectors be chosen continuously, for all possible spins?

Is relativity necessary for the existence of life?

Are Newton's gravity waves detectable by a laser interferometer?

The complementary variable to the qubit and spin-1/2

Why are the lighter halogens gases?

Could ball lightening be a form of plasma?

Does throwing a watch into the air cause it to gain or lose time?

Can the earth's magnetic field be generated by heat from a natural nuclear reactor?

How much radiation exposure in the US was caused by the 105 nuke tests in the Pacific?

How does slow anti-hydrogen annihilate with normal matter in the lab?

What is the exponential form gamma matrix for a general rotation and boost?

Could life survive a pole shift caused by an asteroid collision?

What restricts the value of weak hypercharge from being 5/3?

What is the quantum / Berry-Pancharatnam phase for a spin-j state with z-component m?