South-pointing chariot - Wikipedia, the free encyclopedia have to rotate no more than a couple of degrees over a journey of a hundred kilometres, but this would require the chariot's wheels to be equal in diameter to within one part in a million. Even if the process of manufacturing the wheels were capable of this precision (which would not be possible with ancient Chinese methods), it is doubtful that the equality of the wheels could be maintained for long as they are subjected to the we with terminal_orbit
Understanding E = mc2 - Energy TribuneEnergy Tribune and solar electricity can play a significant role in meeting the demand. The problem arises when solar enthusiasts try to claim solar power can provide base load power for an industrial society. There is no technology for storing commercial quantities of electricity. Until something is developed – which seems unlikely – wind and solar can serve only as intermittent, unpredictable resources. with terminal_orbit