Recent content by Patrick Pihl

Well, then it make sense. Not very intuitive (to me) that power increase that way in relation to drag.

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.

Number and kind of particles in the object?

Stretching a rubber band increase its mass due to e=mcc, but how?

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...

Thanks! What would be a short / large distance in this context?

Would it be a drop in power as the square of the distance in a directed microwave beam? Thanks!