Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and µm/hour. Briefly describe how you arrived at this estimate.

Estimate the average speed with which you go from home to campus via whatever mode of transportation you use most commonly. Give your answer in both mph and m/s. Briefly describe how you arrived at this estimate.

Estimate the height of a telephone pole. Give your answer in both feet and meters. Briefly describe how you arrived at this estimate.

Estimate (don’t measure!) the length of a typical car. Give your answer in both feet and meters. Briefly describe how you arrived at this estimate.

Compute the following numbers, applying the significant figure rule adopted in this textbook.

a.

b.

c.

d.

Compute the following numbers, applying the significant figure rule adopted in this textbook.

a.

b.

c.

d.

Using the approximate conversion factors in Table 1.5, convert the following to SI units to English units without using your calculator.

a. 30 cm

b. 25 m/s

c. 5 km

d. 0.5 cm

Using the approximate conversion factors in Table 1.5, convert the following to SI units without using your calculator.

a. 20 ft

b. 60 mi

c. 60 mph

d. 8 in

Convert the following to SI units:

a) 3 hours

b) 2 days

c) 1 year

d) 215 ft/s

Convert the following to SI units:

a) 8.0 in

b) 66 ft/s

c) 60 mph

d) 14 in²