Numeracy: Difference between revisions
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*a human needs 3000 Calories in a day, 2000 if inactive | *a human needs 3000 Calories in a day, 2000 if inactive | ||
*note that 1 Calorie (human diet calories) = 1000 calories (pure energy sense calories) | *note that 1 Calorie (human diet calories) = 1000 calories (pure energy sense calories) | ||
*Ie, a human needs 100w on average | |||
=Links= | =Links= | ||
Revision as of 16:38, 19 May 2015
OSE Case
For OSE, numeracy refers to being quick with numbers: understanding magnitudes, orders of magnitude, back of the envelope calculations, basic physics formulas like F=Ma, sizes (like acres and square miles), distances, weights, etc. This refers to working knowledge for quantifying things to one order of magnitude:
- how much power does it take to dual a human?
- How many square miles are there is the USA?
- How many cubic meters of biochar one need to apply 1/4" of biochar per acre?.006 m * 4000 sq m = 24 cubic meters
- How much does a cubic yard of soil weigh?
- How many millimeters of topsoil is lost per acre if the figure is 5 tons per acre?
- How much does one cubic meter of water weight? Of steel? Of rock? Wood?
- Based on a 1% annual growth rate of world population, how many people are born each year?
Specifics
- about 1M calories in a kW hr.
- a human needs 3000 Calories in a day, 2000 if inactive
- note that 1 Calorie (human diet calories) = 1000 calories (pure energy sense calories)
- Ie, a human needs 100w on average