Question 28A short chain is usually attached to the back of a petrol tanker and trailing behind it so that theA.petrol tanker is balanced on the roadB.heat generated by friction in the engine can be conducted to the earthC.charges generated by friction in the tanker are conducted to the earthD.tanker can move slowly as the chain touches the road surfaceE.chain can produce sound in resonance with the noise from the tanker‘s engineObjective Show full explanation