17 Aug '09 05:58>
Scenario: I take my car out from my parking place, drive a while, uphill and downhill, stopping at red lights, starting at green lights, turning left and turning right, stopping at the supermarket, and go home agian ans put my car at the same parking place.
Question: Have all the energy consumed been converted to heat? Nothing else?
Question two: Does it matter if the engine was electrical or used petrol of some kind?
(These are not trick questions. A friend and I have different answers, and I want a second opinion.)
Question: Have all the energy consumed been converted to heat? Nothing else?
Question two: Does it matter if the engine was electrical or used petrol of some kind?
(These are not trick questions. A friend and I have different answers, and I want a second opinion.)