What is wrong here. If I double speed drag will be 4 times higher. The engine needs to put out approximately 4 times more power. Energy consumption will be 4 time higher for a specific time period. However if it is a fixed distance I will arrive in half the time an the energy consumption will...
Thank you all! That gives me a slightly better understanding :)
I should have thought about that myself when knowing that mass also increase with speed.
PV panels are black or dark blue as far as I know so is it obvious that its better to put up a PV-panel compared to just paint the same surface white?
Yes one would need to brighten up a big area to make any difference :) Perhaps something that floats in the ocean water?
Assuming that a black solar panel has an efficiency of 20%. This energy could be used instead of burning oil and decreasing CO2 emission. But the black color also accumulates a significant amount of the solar energy into heat locally on planet surface.
Comparing this with a white panel (non...