An infant's pulse rate is measured to be 135 \pm 4 beats/min. What are the uncertainty and the percent uncertainty in this measurement? An echocardiogram uses 4.4 MHz ultrasound to measure blood flow in the aort
After that, a radio frequency pulse is sent across the sample solution to align the magnetic moments of the nuclei. Free induction decay occurs as the magnetic moments relax. The NMR spectrum is Fourier transformed from the free induction decay. The chemical changes for individual nuclei can be...