15,489 reputation
12148
bio website
location Vancouver, Canada
age 44
visits member for 3 years, 4 months
seen 2 days ago

Mostly C++ programmer in Vancouver.
Specialising in image processing, 3d modeling, Lidar - I'm really a physicist


2d
revised How is North Korea planning to test a nuclear device underground?
added 191 characters in body
2d
comment Why nuclear tests move under ground since 1964?
It also provides less information to the opposition. It's harder for spy sats to measure the yield and harder to collect any samples of the waste products to identify the weapon design or performance.
Jul
28
comment How accurately can I expect to measure the gravitational constant with a club of college students?
@User58220 Originally they hoped the Earth was uniform enough that any North-South line would work.
Jul
27
comment How accurately can I expect to measure the gravitational constant with a club of college students?
Probably depends on how accurately you can measure the mutual attraction between the students. Can you suspend one of them from a rope and measure g from the pendulum period?
Jul
16
awarded  Nice Answer
Jul
16
comment Do we feel the full force of the earths gravity even though the earth is spinning
see physics.stackexchange.com/q/9751
Jul
10
revised Why is it necessary for an object to have a bigger size than the wavelength of light in order for us to see it?
deleted 18 characters in body
Jul
6
revised Fork and Sheet Lightning
deleted 3 characters in body
Jul
6
awarded  everyday-life
Jul
6
answered Fork and Sheet Lightning
Jul
3
awarded  Notable Question
Jun
30
comment Should a Faraday cage block a radio's signal?
@AndrewGrimm as long as the gaps are significantly smaller than a wavelength then they don't matter. That's why your microwave (15cm) has a mesh with 1mm holes in the door. But for high frequencies, and ultra low noise, it is difficult to make an effective screen
Jun
29
answered Should a Faraday cage block a radio's signal?
Jun
28
comment Differences between 3 apples and 3 kg of apples according to base units
The SI unit of amount is the mole so he could have 0.5E-23 moles of apples
Jun
20
comment Any cheap (less than 100 euro) telescope for observing Jupiter?
there is a new site that it would be perfectly on topic for area51.stackexchange.com/proposals/40709/astronomy but that doesn't appear in the close reasons - presumably because it's beta?
Jun
20
comment Any cheap (less than 100 euro) telescope for observing Jupiter?
astronomy beta isn't listed as an other-site close option
Jun
13
revised Economical ways for Cooling liquid nitrogen
added 610 characters in body
Jun
13
answered Economical ways for Cooling liquid nitrogen
Jun
1
comment Why a slow moving neutron is required in nuclear plants?
@Harry think of the nucleas as a drop of water. A fast neutron goes straight through before it can have any effect. A slow neutron stays in the nucleas long enough for it to interact with other nucleons, pass on some energy and split the nucleas
May
19
comment Is radioactive decay spontaneous or random?
I think you are a victim of the "learn the precise phrase in the textbook and repeat it" school of education. Sorry to hear that it has spread outside the USA