Volume Volume is the amount of space occupied by an object 250 mL 500 mL 1L containers 1.0 Liter = 1000 mL = m 3 = 1 dm 3 = 1000 cm ft 3 =? in 3 Metric Unit: meter 3, cm 3, etc 1.0 ft 3 = 1728 in 3 ©mcgraw-hill.

Mass ©mcgraw-hill. Salt crystals ~ 50 mg = 0.05g = 5x10 -5 kg Adult ~70kg = 70,000g = 7x10 7 mg Mass is the quantity of matter in an object (traditional) Inertial Mass – Resistance to acceleration (Physics)

Mass Measurement Standard Kilogram Balances Independent of location

Weight F = ma Weight = m x g where g is the gravitational acceleration W = mg Depends on location as g varies from place to place Spring Balance

Mass vs Weight Weight Force Measure on force balance e.g. spring or magnetic Depends on location Moon weight kg Kokomo weight kg Greenwood weight kg Mass Quantity of matter Measure on beam balance Independent of location Mass kg

Density Density = Mass Volume Intrinsic property Independent of amount

Density Applications + = ? Any floating object displaces its own weight of fluid. – Archimedes of Syracuse [3ArchimedesSyracuse [3 Determine Density of liquid Determine Volume of irregular dense solid Determine mass of floating solid

Specific Gravity Specific Gravity is the ratio of the density of the material to the density of a reference (usually water). ©mcgraw-hill Submerged ObjectFloating Object DensityGreater than liquidLess than liquid Volume= Vol of liquid displaced Vol submerged = Vol displaced Mass = Mass of liquid displaced

Mass: Pepsi vs Diet Pepsi