What is the approximate largest circumference of a circular pond that could fit within a square walkway of sides 30 meters? a.47 mb.60 mc.94 md.120 m

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

Can someone answer this question for me

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in