Recent content by FieldOpsGirl

Great. Thank you all very much. :smile:

No problem. It was a good thought, just not quite what I was looking for this time. Thanks, though. Excellent. Is that just visible light, or also the spectral neighbors?

Ah, very good. Thanks. How much absorption is realistic for a metallic (say, steel) surface that is painted black? Is it even close to that 1kw per square meter?

Ideally, I would do that very thing. However, if I could get some idea of power/area I could much more directly optimize the size of my container to maximize the amount of warm water I could get. i.e. If I have a small amount of water and a large area, I'm sure the water will be quite warm, but...

I'm trying to figure out a simple way to estimate how much energy (in the form of heating water) can be collected by a black metal surface of a given area exposed to direct sunlight during the day. Any thoughts?

I have questions about magnetic attraction in both conceptual and application. I am not a physicist (medical background) so I may have insufficient understanding of the concepts involved, but any clarification would be helpful. Suppose I have a field source, such as a permanent magnet, and a...