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How you can tell time without a watch is to calculate the sun's positions. If you kind of remember the time last time use that data in your head and try to inference how much timed passed, but if you don't know you can tell by positions, brightness or inference. The positions is like how the sun is raised or dropped. I hope this is useful, also you have to ...


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As principle behind this think about your old light bulb. One emergency method of lighting a fire used to be to break the glass of the light bulb in your flashlight and burn the filament, no more no less than the way its done with a strand of steel wool for example. Now, when you put the filament between positive and negative there will be some resistance in ...



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