Maybelline Cousteau’s backup oxygen tank reads 900 mmHg while on her boat, where the temperature is 27 o C. When she dives down to the bottom of an unexplored methane lake on a recently-discovered moon of Neptune, the temperature will drop down to –183 o C. What will the pressure in her backup tank be at that temperature? (270 mmHg)

answer: if she breaths she a thho

explanation:

easy

explanation:

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.