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bio website scholarpedia.org/article/…
location Arizona
age 46
visits member for 1 year, 7 months
seen Apr 13 at 19:36

Author of the Wikipedia pages Kepler's Equation, and Radial Trajectory. Assistant editor at Scholarpedia. Google+ profile.


Apr
2
awarded  Informed
Mar
21
answered Energy required to kick a planet orbiting the Sun from an elliptical to a parabolic path
Mar
21
revised Energy required to kick a planet orbiting the Sun from an elliptical to a parabolic path
Corrected equation: M is the mass of the planet.
Mar
21
suggested suggested edit on Energy required to kick a planet orbiting the Sun from an elliptical to a parabolic path
Jan
7
comment Why exactly does current carrying two current wires attract/repel?
Consider two infinite charged wires 1 cm apart, held together by a series of springs spaced 1 cm apart along the wire (1 spring per cm). Now boost to a frame moving along the wires at .866 c. The Lorentz factor is 2, so charge density doubles in the new frame because of length contraction. The spring density also doubles (2 springs per cm) to exactly cancel the increase in the repulsive electrostatic force. If there is an additional attractive force-per-meter due to the current in this frame, there must also be an additional repulsive force-per-meter we haven't considered. Right?
Dec
11
answered The validity of the Longitude of Perihelion
Dec
10
awarded  Critic
Oct
22
awarded  Organizer
Oct
22
revised How long a straw could Superman use?
Typographical errors
Oct
22
revised Defining simultaneity with a central light vs with clocks
Typo, grammar
Oct
22
revised Sign in the time-independent Schrödinger's equation
Formatted the math. Tried to make sense of the question.
Oct
22
reviewed Reviewed How long a straw could Superman use?
Oct
22
suggested suggested edit on How long a straw could Superman use?
Oct
22
reviewed No Action Needed How to derive the Mott gap mathematically
Oct
22
reviewed Reviewed Sign in the time-independent Schrödinger's equation
Oct
22
suggested suggested edit on Sign in the time-independent Schrödinger's equation
Oct
22
reviewed No Action Needed What does “along the handle of the cart” mean? And how does one calculate weight?
Oct
22
reviewed Reviewed Defining simultaneity with a central light vs with clocks
Oct
22
suggested suggested edit on Defining simultaneity with a central light vs with clocks
Sep
18
revised Commutation of abstract $O(3)$ generators and vectors
Removed emoticons, etc.