All Questions
5
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Explain how shall we get a direction at a point on the surface of earth other than north pole using magnetic compass [closed]
The Qibla Compass can give the direction towards "some points on earth" other than north pole, eg : Mecca.
Wikipedia first paragraph, last two lines :
To determine the proper direction, one ...
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1
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1
answer
69
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Calculating angle from sphere
I'm trying to calculate the angle Phi in the picture in the case where the droplet is the perfect sphere I have the correct formula but I'm not sure how they found it. and I want to know the formula ...
- 29
1
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1
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77
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Finding weight in Megagrams (Mg) given circumference and density
Glaciers often deposit large rocks called erratics. The granite rock has a circumference of 9.5 m. Assuming it conforms to the shape of a sphere, what would be its weight in Megagrams (Mg), where 1 Mg ...
- 11
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Light Transport Artifacts with Signed Distance Functions
I've been messing around with ray-marched geometry for a game engine and recently messed around with a fully ray-driven lighting system. At one stage I had a very nice system that accurately traced ...
- 103
2
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1
answer
71
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Show, for a sphere, $\langle r^2\rangle = \frac{3}{5}r_o ^2$
The following equation is used as an inference but not explained in my solid state physics book (Economou, "The Physics of Solids"). I figure it's a math/geometry problem so I ask here. Can anyone ...
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