a) How deep must a submarine be immersed in sea water (specific gravity is 1.03) for its shell to experience an "absolute" pressure that is 3.5 times the atmospheric pressure (Assume standard atmospheric pressure). Give your answer in English and Metric Systems of units.
b) At what ambient temperature will a thermometer scaled in °F and a thermometer scaled in °C indicate the same numerical value? What will that ambient temperature be in K and R?