In SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably mole comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical Intuition. More precisely, show that (a) 1.0m/s=3.6km/h and 1.0m/s=2.2mi/h .

How many significant figures are there in (a) 0.0210, (b) 5.060, (c) 7.10 * 10-4,(d) 1.0 * 105?

Estimate the number of jelly beans in the jar of Fig. 1–18. FIGURE 1–18 Problem 45. Estimate the number of jelly beans in the jar.

(a) How many significant figures are in the numbers 99.0 and 100.0?

How many significant figures are in the following numbers? (a) 78.9 ±\pm± 0.2 (b) 3.788 ×\times× 109 (c) 2.46 ×\times× 10–6 (d) 0.005 3

(I) Express the following using the prefixes of Table 1–4: (a)1 x 106 volts,  (b) 2 x 10–6 meters, (c) 6 x 103 days, (d) 18 x 102 bucks, and (e) 7 x 10–7 seconds.

Perform the following operation leaving your answer with the correct number of significant figures: [(2.57 x 103)/(4.44 x 10-5)]4

How many significant figures are in the following numbers? (a) 100.0 ± 0.4(b) 4.000 ✕ 106(c) 4.20 ✕ 10-11(d) 0.0060

(II) A typical atom has a diameter of about 1.0 x 10–10 m. (a) What is this in inches? (b) Approximately how many atoms are along a 1.0-cm line, assuming they just touch?