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:

i think the answer is a, hope this : )

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me