PHYSICS 135 Chapter Notes - Chapter 14: Hydrometer, Styrofoam, Pennsylvania Route 433
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Identify: use eq. (14. 1) to calculate the mass and then use w mg= Execute: for a cylinder of length l and radius r, Evaluate: the rod is less than 1m long and less than 3 cm in diameter, so a weight of around 10 lbs seems reasonable. The mass m of a volume v of gasoline is m. 1 m of gasoline has a mass of 737 kg. (7. 8 10 kg/m )(5. 474 10 m ) 4. 27 kg, (0. 01425 m) (0. 858 m) 5. 474 10 m . 1 gal 3. 788 l 3. 788 10 m (45. 0 mi/gal) Evaluate: 1 gallon of gasoline has a mass of 2. 79 kg. The car goes fewer miles on 1 kg than on 1 gal, since. 1 kg of gasoline is less gasoline than 1 gal of gasoline. Execute: (5. 0 10 m)(15. 0 10 m)(30. 0 10 m) 2. 25 10 m. Evaluate: the average density is only 36% that of gold, so at most 36% of the mass is gold.
