Perform the following calculations and express your answer using the correct number of significant digits.
A woman has two bags weighing 13.5 lb and one bag with a weight of 10.2 lb. What is the total weight of the bags?
The force on an object is equal to its mass multiplied by its acceleration . If a wagon with mass 55 kg accelerates at a rate of 0.0255 m/s2, what is the force on the wagon?
A speedometer has an uncertainty of 3.0 km/h at a speed of 98 km/h.
What is the percent uncertainty of the speedometer?
Assuming that the percent uncertainty in the speedometer at 60 km/h is the same as at 98 km/h, what is maximum difference between the speed indicated by the speedometer and the speed that you might be moving at?