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density = mass/volume
In your example,
density(object) = 5.5/7 g/cm3 = 0.8 g/cm3.
Note that I rounded the last number to one significant decimal, as the volume (7 cm3) is specified with only one significant decimal. A volume of 7 cm3 varies between 6.5 cm3 and 7.4 cm3, and the answer conforms to a "good estimate".
If the volume had been specified as 7.0 cm3, then the answer would be different, namely
density(object) = 5.5/7.0 g/cm3 = 0.79 g/cm3,
rounded to two significant decimals, as we now have assumed more accuracy, the answer is also a "better estimate", because in the first case, the answer would actually range between 5.54/6.50 = 0.852 and 5.45/7.49 = 0.728 (which average to exactly 0.79, please check this).
<Feb 18, 2014 - B.C.>
What else can I help you with?
What property is desinty?
Density is an intensive physical property. It is the mass per unit of volume. The formula is Density = mass/volume. So if an object has a mass of 28g and a volume of 7cm3, the density would be 28g/7cm3 = 4g/cm3.
What is the density of mass 3 g and vloume of 7cm3?
Density=mass/volume Density= 3g/7cm3 Density= 0.429 g/cm3 (3sf)
What is the density of a cube that has a mass of 42 grams and a volume of 7cm3 show your work?
Density = (mass) divided by (volume) = (42) divided by (7) = 6 grams per cm3 . Next time, it'll be a lot easier if you just have your teacher contact us directly.
What is the density of an object that has a mass of 28g and a volume of 7 ml?
120g ------ = 17.11111g/mL 7mL density = mass/volume =kg/m 3 1000ml = 1000cm3 7ml=7cm3 7ml = 0.000007m3 120g=0.12Kg density =0.12/0.000007 = 17142.86kg/m3 realisticaly though your talking about a teaspoon (7ml) of something with a mass of 120g. are you sure your question is correct because even lead wouldn't have this much mass
