The answer to this question is hard as it is dependant upon:
Efficiency of engine and gear box. Weight of car. Aerodynamic resistance of car.
These are the main contributors to vehicular...
It will differ. If your average footstep is 1 meter then there will be 1,000 footsteps in a km. You will have to do the math and measure your footsteps. See how many you take in 100 meters and then...
Unfortunately, there are several units called barrel; the summary of the Wikipeda article says (emphasis added): A barrel is one of several units of volume, with dry barrels, fluid barrels (UK beer...