What gases are exchanged in the respiratory system

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

Which wave is the result of amplification and produces a louder sound