Acar speedometer has a 3% uncertainty. what is the range of possible speeds when it reads 70 km/h? a.) highest and lowest km/h b.)highest and lowest mi/h

(a) A 3 % uncertainty means a 3% uncertainty on the measured value.

The measured value is . The 3 % of this value is

So, the highest and lowest values are:

(b) To find the highest and lowest speeds in mi/h, we need to convert into these units. keeping in mind that

we have:

frequency or wavelenth of em radiation in a vacuum