. (a) A person's blood pressure is measured to be 120 ± 2 mm Hg120 ± 2 mm Hg . What is its percent uncertainty? (b) Assuming the same percent uncertainty, what is the uncertainty in a blood pressure measurement of 80 mm Hg?

(a) If your speedometer has an uncertainty of 2.0km/h2.0km/h at a speed of 90km/h90km/h , what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60km/h60km/h , what is the range of speeds you could be going?

Which one of the following statements is true?Group of answer choicesOnly the quantities we measure directly have uncertainties; once we perform calculations with these quantities our answer is exact.If a height is recorded as h = (12 ± 3) mm, then it is absolutely certain that the height is between 9 mm and 15 mm.When we repeat a measurement many times and take the average value of these measurements, the uncertainty on this average (i.e. the SEM) is generally expected to be smaller than the uncertainty on the individual measurements.We only have uncertainties in first year lab because our equipment is not precise enough; in research labs there is no uncertainty.

The kinetic energy of a body is determined from measurements of its momentum p and its mass m.The percentage uncertainties in the measurements are:p± 3%m±4%What is the percentage uncertainty in the kinetic energy?A. 7%B. 10%C. 13%D. 14%

When non-metric units were used in the United Kingdom, a unit of mass called the pound-mass (lbm) was employed, where 1lbm=0.4539kg1lbm=0.4539kg . (a) If there is an uncertainty of 0.0001kg0.0001kg in the pound-mass unit, what is its percent uncertainty? (b) Based on that percent uncertainty, what mass in pound-mass has an uncertainty of 1 kg when converted to kilograms?

An infant's pulse rate is measured to be 130±5130±5 beats/min. What is the percent uncertainty in this measurement?