(4-7) a piston-cylinder device initially contains 0.07m3 of nitrogen gas at 130 kpa and 120℃. the nitrogen is now expanded polytropically to a state of 100 kpa and 100℃. determine the boundary work done during this process.

It's true it didin't work becouse britain continued trading with it's colonies and the system hurt economies of the countries that used it

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Answer59.2kg; /

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.