*1–12. Convert each of the following and express the
answer using an appropriate prefix: (a) 175 lb>ft3 to
kN>m3, (b) 6 ft>h to mm>s, and (c) 835 lb # ft to kN # m.
1–13. Convert each of the following to three significant
figures. (a) 20 lb # ft to N # m, (b) 450 lb>ft3 to kN>m3, and
(c) 15 ft>h to mm>s.
1–14. Evaluate each of the following and express with an
appropriate prefix: (a) (430 kg)2, (b) (0.002 mg)2, and
(c) (230 m)3.
1–15. Determine the mass of an object that has a weight
of (a) 20 mN, (b) 150 kN, (c) 60 MN. Express the answer to
three significant figures.
*1–16. What is the weight in newtons of an object that has
a mass of: (a) 10 kg, (b) 0.5 g, (c) 4.50 Mg? Express the
result to three significant figures. Use an appropriate prefix.
1–17. If an object has a mass of 40 slugs, determine its
mass in kilograms.
1–18. Using the SI system of units, show that Eq. 1–2 is a
dimensionally homogeneous equation which gives F in
newtons. Determine to three significant figures the
gravitational force acting between two spheres that are
touching each other. The mass of each sphere is 200 kg and
the radius is 300 mm.
1–19. Water has a density of 1.94 slug>ft3. What is the
density expressed in SI units? Express the answer to three
significant figures.
*1–20. Two particles have a mass of 8 kg and 12 kg,
respectively. If they are 800 mm apart, determine the force
of gravity acting between them. Compare this result with
the weight of each particle.
1–21. If a man weighs 155 lb on earth, specify (a) his mass
in slugs, (b) his mass in kilograms, and (c) his weight in
newtons. If the man is on the moon, where the acceleration
due to gravity is gm = 5.30 ft>s2, determine (d) his weight
in pounds, and (e) his mass in kilograms.
*1–12. Convert each of the following and express theanswer using an appropriate prefix: (a) 175 lb>ft3 tokN>m3, (b) 6 ft>h to mm>s, and (c) 835 lb # ft to kN # m.1–13. Convert each of the following to three significantfigures. (a) 20 lb # ft to N # m, (b) 450 lb>ft3 to kN>m3, and(c) 15 ft>h to mm>s.1–14. Evaluate each of the following and express with anappropriate prefix: (a) (430 kg)2, (b) (0.002 mg)2, and(c) (230 m)3.1–15. Determine the mass of an object that has a weightof (a) 20 mN, (b) 150 kN, (c) 60 MN. Express the answer tothree significant figures.*1–16. What is the weight in newtons of an object that hasa mass of: (a) 10 kg, (b) 0.5 g, (c) 4.50 Mg? Express theresult to three significant figures. Use an appropriate prefix.1–17. If an object has a mass of 40 slugs, determine itsmass in kilograms.1–18. Using the SI system of units, show that Eq. 1–2 is adimensionally homogeneous equation which gives F innewtons. Determine to three significant figures thegravitational force acting between two spheres that aretouching each other. The mass of each sphere is 200 kg andthe radius is 300 mm.1–19. Water has a density of 1.94 slug>ft3. What is thedensity expressed in SI units? Express the answer to threesignificant figures.*1–20. Two particles have a mass of 8 kg and 12 kg,respectively. If they are 800 mm apart, determine the forceof gravity acting between them. Compare this result withthe weight of each particle.1–21. If a man weighs 155 lb on earth, specify (a) his massin slugs, (b) his mass in kilograms, and (c) his weight innewtons. If the man is on the moon, where the accelerationdue to gravity is gm = 5.30 ft>s2, determine (d) his weightin pounds, and (e) his mass in kilograms.
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