A weather balloon at ground level where the pressure is 725 mm Hg and the temperature is 13°C has a volume of 258 L. The balloon ascends to an altitude 2500 ft where the temperature is -22°C . The volume of the balloon increased to 375 L. What is the pressure inside the balloon at 1500 ft.

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.