The following results are computed through VC++ 6.0 1/13/2008 delta delta T v T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 283 10 330.454 336.452 5.99784 0.599784 273 282 9 330.454 335.857 5.40288 0.60032 273 281 8 330.454 335.261 4.80686 0.600857 273 280 7 330.454 334.664 4.20978 0.601397 273 279 6 330.454 334.066 3.61163 0.601938 273 278 5 330.454 333.467 3.01241 0.602481 273 277 4 330.454 332.866 2.41211 0.603027 273 276 3 330.454 332.265 1.81072 0.603574 273 275 2 330.454 331.662 1.20825 0.604123 273 274 1 330.454 331.059 0.604674 0.604674 T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 273.9 0.9 330.454 330.998 0.544257 0.60473 273 273.8 0.8 330.454 330.938 0.483828 0.604785 273 273.7 0.7 330.454 330.878 0.423388 0.60484 273 273.6 0.6 330.454 330.817 0.362937 0.604895 273 273.5 0.5 330.454 330.757 0.302475 0.604951 273 273.4 0.4 330.454 330.696 0.242002 0.605006 273 273.3 0.3 330.454 330.636 0.181518 0.605061 273 273.2 0.2 330.454 330.575 0.121023 0.605117 273 273.1 0.1 330.454 330.515 0.0605172 0.605172 T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 273.09 0.09 330.454 330.509 0.054466 0.605178 273 273.08 0.08 330.454 330.503 0.0484147 0.605183 273 273.07 0.07 330.454 330.497 0.0423632 0.605189 273 273.06 0.06 330.454 330.491 0.0363117 0.605194 273 273.05 0.05 330.454 330.484 0.03026 0.6052 273 273.04 0.04 330.454 330.478 0.0242082 0.605205 273 273.03 0.03 330.454 330.472 0.0181563 0.605211 273 273.02 0.02 330.454 330.466 0.0121043 0.605216 273 273.01 0.01 330.454 330.46 0.00605222 0.605222 T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 273.01 0.01 330.454 330.46 0.00605222 0.605222 273 273.009 0.009 330.454 330.46 0.005447 0.605223 273 273.008 0.008 330.454 330.459 0.00484178 0.605223 273 273.007 0.007 330.454 330.458 0.00423657 0.605224 273 273.006 0.006 330.454 330.458 0.00363135 0.605224 273 273.005 0.005 330.454 330.457 0.00302612 0.605225 273 273.004 0.004 330.454 330.457 0.0024209 0.605225 273 273.003 0.003 330.454 330.456 0.00181568 0.605226 273 273.002 0.002 330.454 330.455 0.00121045 0.605226 273 273.001 0.001 330.454 330.455 0.000605227 0.605227 If we choose T1 < T0, we have T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 263 -10 330.454 324.345 -6.10874 0.610874 273 264 -9 330.454 324.962 -5.4927 0.6103 273 265 -8 330.454 325.576 -4.87782 0.609728 273 266 -7 330.454 326.19 -4.2641 0.609158 273 267 -6 330.454 326.803 -3.65154 0.60859 273 268 -5 330.454 327.414 -3.04012 0.608024 273 269 -4 330.454 328.024 -2.42984 0.607461 273 270 -3 330.454 328.634 -1.8207 0.606899 273 271 -2 330.454 329.242 -1.21268 0.60634 273 272 -1 330.454 329.848 -0.605783 0.605783 T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 272.9 -0.1 330.454 330.394 -0.0605283 0.605283 273 272.91 -0.09 330.454 330.4 -0.054475 0.605277 273 272.92 -0.08 330.454 330.406 -0.0484218 0.605272 273 272.93 -0.07 330.454 330.412 -0.0423686 0.605266 273 272.94 -0.06 330.454 330.418 -0.0363156 0.605261 273 272.95 -0.05 330.454 330.424 -0.0302628 0.605255 273 272.96 -0.04 330.454 330.43 -0.02421 0.60525 273 272.97 -0.03 330.454 330.436 -0.0181573 0.605244 273 272.98 -0.02 330.454 330.442 -0.0121048 0.605239 273 272.99 -0.01 330.454 330.448 -0.00605233 0.605233 T0 T1 T1-T0 v(T0) v(T1) v(T1)-v(T0) Average ROC 273 272.999 -0.001 330.454 330.454 -0.000605228 0.605228 273 272.999 -0.0009 330.454 330.454 -0.000544705 0.605228 273 272.999 -0.0008 330.454 330.454 -0.000484182 0.605228 273 272.999 -0.0007 330.454 330.454 -0.00042366 0.605228 273 272.999 -0.0006 330.454 330.454 -0.000363137 0.605228 273 273 -0.0005 330.454 330.454 -0.000302614 0.605228 273 273 -0.0004 330.454 330.454 -0.000242091 0.605228 273 273 -0.0003 330.454 330.454 -0.000181568 0.605228 273 273 -0.0002 330.454 330.454 -0.000121046 0.605228 273 273 -0.0001 330.454 330.454 -6.05228e-005 0.605228 We see, the Average ROC of spped of sound in dry air approaches the instantaneous ROC approximately 0.605228 m/s per K. We calculated it by letting T1 approach T0 = 273 from both sides, namely T1 > 273 and T1 < 273.