Handy measurements
From NoskeWiki
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About
In appearing knowledgeable and figuring out problems, it helps to know a few measurements. On this pages I've included what I consider some important stats to know (but many of which I forget).
Important Constants
• Pi: | 3.1415927 | (Constants: Pi) |
• e: | 2.7182818 | (Constants: e)... base of natural logarithms = lim(0->inf) (1+1/n)^n |
Handy Conversions
• 1 mile ~= 1.6 kilometers |
• 1 kilogram ~= 2.2 pounds |
Useful Computer Science Values
• 2^{8} | = 256 .....(one byte - unsigned int / char) |
• 2^{10} | = 1,024 ............... 2^{20} = 1 million ..... 2^{30} = 1 billion (and so on) |
• 2^{16} | = 65,536 .....(two bytes - short) |
• 2^{32} | = 4,294,967,296 .....(two bytes - int) |
• 2^{64} | = 18,446,744,073,709,551,626 (1.8x10^19) .....(four bytes - long) |
See Also
- Handy world statistics
- Computer metrics - lists out the cost, speed and capacity of modern computer components
Links
- Wikipedia - Earth - contains stats on the earth