Adiesel engine accomplishes ignition without a spark plug by an adiabatic compression of air to a temperature above the ignition temperature of the diesel fuel, which is injected into the cylinderat the peak of the compression. suppose air is taken into the cylinder at 280 k and volume v1and is compressed adiabatically to 560 0cand volume v2. assuming that the air behaves as a n ideal gas whose ratio of cpto cvis 1.4, calculate the compression ratio v1/v2of the engine.