The volume of a gas is 400.0 mL when the pressure is 101 KPa. What is the pressure at which the volume of the gas is 2000 mL?

Independent variable is something that is changed in a experiment. 

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached

Answer mechanical energy;

The answer would be d. hope this : ))