11,676 reputation
21946
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location New England (USA)
age 52
visits member for 1 year, 2 months
seen 4 hours ago

Enthusiastic amateur - every since I wrote my first program, which generated a magic square of arbitrary odd order. I did this in 1975, with the help of a library book on ALGOL 68, and without access to a computer. Eventually I enlisted the help of a student next door, who took my handwritten code, converted it to punch cards, and ran it on the University computer... The next week, he returned with the printout of a 49x49 magic square - and so a passion was born.


5h
awarded  Nice Answer
6h
comment finding angle of intersection in terms of the angle between mirrors
I have added what I believe to be the diagram that describes what you are doing. Please confirm it this is correct.
6h
revised finding angle of intersection in terms of the angle between mirrors
added 102 characters in body
6h
reviewed Close What are the factors affecting transparency and color of a substance
7h
comment How close can you get to lava before burning?
That's a great description - and your answer is not inconsistent with mine (given the extremely fluffy approximations I made). "orange-red" on the blackbody scale does correspond to about 1200 K - see for example midnightkite.com/color.html: this was the value that is hardest to estimate and most critical to get right.
8h
awarded  Good Answer
9h
comment How close can you get to lava before burning?
Awesome link @annav!
10h
comment If I squeeze something really hard, will it ever become two-dimensional?
Does graphite fall into this class or were you thinking of something more esoteric?
19h
comment How hot is it on the slopes of an erupting volcano?
Some calculations can be found at physics.stackexchange.com/a/136733/26969 - more related to radiated heat but you get the idea.
19h
awarded  Civic Duty
19h
comment Asymmetric heat conduction?
Right now your score is 911-1-1-6 including badges. I feel bad destroying the rotational symmetry but this deserves an upvote...
21h
awarded  Nice Answer
23h
comment How is the Photoelectric Effect affected by Blue-Shifting
Very nice. The concept of an apparent work function is interesting. I wonder if one could come up with a good explanation. Maybe the greater mass of the electrons changes the momentum exchanged during the interaction?
23h
answered If I squeeze something really hard, will it ever become two-dimensional?
1d
comment Is a motor HP torque directly proportional to the increasing HP among identical motors?
Maybe you will get better answers. At least this should be a start...
1d
reviewed Approve suggested edit on Is a motor HP torque directly proportional to the increasing HP among identical motors?
1d
comment The purpose of auxiliary lens in microscope
Note that 90x "zoom" and 90x "magnification" are not the same thing... 90x magnification is not a particularly challenging task for a microscope.
1d
comment pressure on a sealed vessel
The concept here is "differential pressure". Chris is right.
1d
answered Is a motor HP torque directly proportional to the increasing HP among identical motors?
1d
comment Is a motor HP torque directly proportional to the increasing HP among identical motors?
Then they must have used the same torque. In which case I don't quite understand the question?