Reply to post: Friends, families and physics...

BOFH: We must... have... beer! Only... cure... for... electromagnetic fields

juice Silver badge

Friends, families and physics...

I did once have a somewhat confusing conversation with an older relative once, around electric cars. They'd heard of regenerative braking, and were therefore convinced that an electric car should therefore be able to run forever on a single charge, as all the power would go back into the battery every time they braked.

Empirical evidence aside - i.e. electric cars do NOT run forever on a single charge - I was completely unable to get them to understand that all energy conversions are lossy (usually as heat) and therefore even regenerative braking doesn't magically give you a perpetual motion machine...

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