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– Nelson Mandela

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Q 1. The Pascal (Pa) is actually a very small unit of pressure. To show how small 1 Pascal is, convert it to lb/ft2. 2. What is the weight in newtons of an object that has a mass of (a) 10 kg, (b) 0.5 g, (c) 4.5 Mg? Express the result to three significant figures. 3. The specific weight (wt./vol.) of brass is 520 lb /ft3. Determine its density (mass/vol.) in SI units. 4. Water has a density of 1.94 slugs/ft3. What is the density expressed in SI units? Express the answer in three significant digits. 5. Determine the mass in Kilograms of an object that has a weight of (a) 20 mN, (b) 150 kN, (c) 60 MN. Express the answer to three significant digits.

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??= 1??2(1 ??4.4482 ?)((0.3048)2 ?21 ??2) 1??=20.8×10?3 ??/??2 2. a) Weight of 10 kg mass; ?(10 ??)=(10)×(9.8)=98.0 ?b) Weight of 0.5 g 0.5 ?=0.51000 ?(0.5?)=(0.51000)×(9.8)=0.00490 ? ?(0.5?)=4.90 ??