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1、111.Round off the following numbers to three significant figures: (a) 4.65735 m, (b) 55.578 s, (c) 4555 N, and (d) 2768 kg.12.Represent each of the following combinations of units in the correct SI form using an appropriate prefix: (a) , (b) ,(c) ,and (d) .kNmsMNks2NmmmMN13.Represent each of the fol
2、lowing quantities in the correct SI form using an appropriate prefix: (a) 0.000431 kg, (b),and (c) 0.00532 km.35.3(103) N*14.Represent each of the following combinations of units in the correct SI form: (a) , (b) , and (c) .mN(kg#ms)NmmMgms 2010 Pearson Education,Inc.,Upper Saddle River,NJ. All righ
3、ts reserved.This material is protected under all copyright laws as they currently exist.No portion of this material may be reproduced,in any form or by any means,without permission in writing from the publisher.1 Solutions 44918 1/21/09 8:43 AM Page 12 2010 Pearson Education,Inc.,Upper Saddle River,
4、NJ. All rights reserved.This material is protected under all copyright laws as they currently exist.No portion of this material may be reproduced,in any form or by any means,without permission in writing from the publisher.15.Represent each of the following combinations of units in the correct SI fo
5、rm using an appropriate prefix: (a) ,(b) ,and (c) .MN(kg#ms)MgmNkNms17.A rocket has a mass of slugs on earth. Specify (a) its mass in SI units and (b) its weight in SI units. If the rocket is on the moon, where the acceleration due to gravity is , determine to three significant figures (c) its weigh
6、t in SI units and (d) its mass in SI units.gm= 5.30 fts2250(103)*18.If a car is traveling at ,determine its speed in kilometers per hour and meters per second.55 mih16.Represent each of the following to three significant figures and express each answer in SI units using an appropriate prefix: (a) 45
7、 320 kN, (b) , and (c) 0.005 63 mg.568(105) mmFPOFPO1 Solutions 44918 1/21/09 8:43 AM Page 23 2010 Pearson Education,Inc.,Upper Saddle River,NJ. All rights reserved.This material is protected under all copyright laws as they currently exist.No portion of this material may be reproduced,in any form o
8、r by any means,without permission in writing from the publisher.19.The pascal (Pa) is actually a very small unit of pressure. To show this, convert to . Atmospheric pressure at sea level is in2.How many pascals is this?14.7 lblbft21 Pa = 1 Nm2FPO110.What is the weight in newtons of an object that ha
9、s a mass of: (a) 10 kg, (b) 0.5 g, and (c) 4.50 Mg? Express the result to three significant figures.Use an appropriate prefix.111.Evaluate each of the following to three significant figures and express each answer in Sl units using an appropriate prefix: (a) 354 mg(45 km) (0.0356 kN), (b) (0.004 53
10、Mg)(201 ms),and (c) 435 MN 23.2 mm.*112.The specific weight (wt. vol.) of brass is . Determine its density (mass vol.) in SI units. Use an appropriate prefix.520 lbft31 Solutions 44918 1/21/09 8:43 AM Page 34 2010 Pearson Education,Inc.,Upper Saddle River,NJ. All rights reserved.This material is pro
11、tected under all copyright laws as they currently exist.No portion of this material may be reproduced,in any form or by any means,without permission in writing from the publisher.113.Convert each of the following to three significant figures: (a) to , (b) to , and (c) 15 ft h to mm s.kNm3450 lbft3N#
12、m20 lb#ft114.The density (mass volume) of aluminum is . Determine its density in SI units. Use an appropriate prefix.5.26 slugft3115.Water has a density of . What is the density expressed in SI units? Express the answer to three significant figures.1.94 slugft3*116.Two particles have a mass of 8 kg
13、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 Solutions 44918 1/21/09 8:43 AM Page 45 2010 Pearson Education,Inc.,Upper Saddle River,NJ. All rights reserved.This material is protected unde
14、r all copyright laws as they currently exist.No portion of this material may be reproduced,in any form or by any means,without permission in writing from the publisher.117.Determine the mass in kilograms of an object that has a weight of (a) 20 mN, (b) 150 kN, and (c) 60 MN. Express the answer to th
15、ree significant figures.118.Evaluate each of the following to three significant figures and express each answer in SI units using an appropriate prefix: (a) , (b) , and (c) .(400 m)3(0.005 mm)2(200 kN)2119.Using the base units of the SI system, show that Eq. 12 is a dimensionally homogeneous equatio
16、n 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 Solutions 44918 1/21/09 8:43 AM Page 56 2010 Pearson Education,Inc.,Upper Saddle River,NJ. All rights reserved.This material is protected under all copyright laws as they currently exist.No portion of this material may
