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16 September, 18:17

You just found a metallic object in a creek bed. From the following tests and Figure 2, determine what it is.

96.5g will balance the object. Its mass is g.

The object displaces 5 mL of water. Its volume is cm 3.

The density of the object is g/cm 3.

The object you found in the creek is

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  1. 16 September, 18:22
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    The mass of the object is 96.5 g.

    The volume of the object is 5 cm³.

    Density = mass/volume = 96.5 g/5 cm³ = 19.3 g/cm³

    The density of the object is 19.3 g/cm³.

    The object you found in the creek is probably a gold nugget

    (density = 19.3 g/cm³).
  2. 16 September, 18:42
    0
    mass: 96.5 g

    volume: 5 cm^3

    density: 19.3 g/cm^3

    The object you found in the creek is a gold nugget

    Explanation:

    If a mass of 96.5g will balance the object in a pair of scales, then its mass is 96.5 g.

    If the object displaces 5 mL of water when you introduce it in some vessel, then its volume is 5 cm^3 (notice that mL and cm^3 are numerically equal).

    The density of an object is the quotient between mass and volume, then the density of the object is: 96.5 g/5 cm^3 = 19.3 g/cm^3

    From its density it can be deduced that the object is a gold nugget.
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