A gas expands from 15 L to 39 L. In the process it performs 1.8 kJ of work. For which type of change can the initial and final pressure of the gas be calculated?

A. isochoric process

B. isothermal process

C. isobaric process

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.