Dhrubajyoti Bhuyan

1. when two cars are about to collide, the drivers switch on a set up which runs the flow of current around a coil of wires wrapped around the vehicles. induced magnetism on both coils around the two cars will repel both cars. the nearer the cars are the greater the force of repulsion, thus preventing accidents.

2. wear resistant spring brakes: when the driver presses the brakes, the force gets transmitted uniformly in 4 springs fitted inside a cylinder drum which presses them and thus absorbs the impuse and stops the car.

3. ammonia is very highly soluble in water at a particular temperature but then at a slightly different temperature the solubility drops significantly. an engine can be run using this property of ammonia which can be used to do PV work at that particular temperature.