What is 1.0x10^-16 grams in nanograms

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

The consumption of fossil fuels could be

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference