Recent content by Baconfish

Ok, so i guess the task must imply you are walking with a steady pace, so no acceleration= no force in that direction. I get it.

Homework Statement Ok, so I have been reading all these threads where people discuss if there is any work being done while walking with a suitcase.[/B]Homework Equations So, everyone says there is no work done by walking since the suitcase is not displaced in the direction of the force by the...

Aha so basically removal of trees and lots of black asphalt..

Hehe that's really cool to think about :) so easy to change the world :p

This maybe explaines one other thing: Many times i´v wondered why often in cities its wet while its laying snow just outside it eaven though the topography is the same, so its probably just waste heat!

Ah yes that makes sense. Thanks! :)

Oh ye! So the i probably should count them out if I am interested in a net heating of the earth. I should only count fission and solar.

But i should count out wind, wave, water and all kinds of renewable energies right? Since they are in a natural cycle. Or maybe not, as the water in a reservoar for example would naturally not end up as heat, but rather move around some rocks on the natural path down the mountain?

Yes i just thought about the Earth as a isolated system afther the energy was taken in. Ok so basically we would heat up the Earth since the IR radiation would come back down again. So if kinetic energy usually ends up like heat this means that power production like fission and fusion (in the...

Ok, we had a discussion in class: If we build solar panels all over the Earth's surface we can collect a good amount of energy. If we use this energy to power el-cars where does the energy end up? The energy law states that no energy can be lost from a system.