Problem 54
What is the difference between a physical quantity and a number?
Problem 55
What are the units used in the SI system to measure mass, volume, length, and temperature? In the metric system?
Problem 56
Give the full name of the following units: (a) \(\mathrm{cc}\) (b) \(\mathrm{dm}\) (c) \(\mathrm{mm}\) (d) \(\mathrm{nL}\) (e) \(\mathrm{mg}\) (f) \(\mathrm{m}^{3}\)
Problem 57
Write the symbol for the following units: (a) nanogram (b) centimeter (c) microliter (d) micrometer (e) milligram
Problem 58
How many picograms are in \(1 \mathrm{mg}\) ? In \(35 \mathrm{ng}\) ?
Problem 59
How many microliters are in \(1 \mathrm{~L} ?\) In \(20 \mathrm{~mL}\) ?
Problem 60
Express the following numbers in scientific notation with the correct number of significant figures: (a) 9457 (b) 0.00007 (c) 20,000,000,000 (four significant figures) (d) 0.012345 (e) 652.38
Problem 61
Convert the following numbers from scientific notation to standard notation: (a) \(5.28 \times 10^{3}\) (b) \(8.205 \times 10^{-2}\) (c) \(1.84 \times 10^{-5}\) (d) \(6.37 \times 10^{4}\)
Problem 62
How many significant figures does each of the following numbers have? (a) 237,401 (b) 0.300 (c) 3.01 (d) 244.4 (e) 50,000 (f) 660
Problem 63
How many significant figures are there in each of the following quantities? (a) Distance from New York City to Wellington, New Zealand, \(14,397 \mathrm{~km}\) (b) Average body temperature of a crocodile, \(299 \mathrm{~K}\) (c) Melting point of gold, \(1337 \mathrm{~K}\) (d) Diameter of an influenza virus, \(0.00001 \mathrm{~mm}\) (e) Radius of a phosphorus atom, \(0.110 \mathrm{nm}\)
