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15 May, 01:48

A balsa wood raft is 1.50 m long, 1.00 m wide, and 0.120 m high. the density of balsa is 380 kg/m^3. what is the mass of the raft? (unit=kg)

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  1. 15 May, 02:08
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    the mass of the raft is 68.4 kg

    Explanation:

    Since Mass is defined as Volume times Density, start by calculating the volume of the raft:

    Volume = length x width x high = 1.5 m x 1.0 m x 0.12 m = 0.18 m^3

    and now multiply it times the given density in order to find its mass:

    Mass = Volume x Density = 0.18 m^3 x 380 kg/m^3 = 68.4 kg.

    Notice that the m^3 units cancel out (they are in numerator and in denominator) leaving just the kg (a unit of mass) in the answer.

    Therefore, the mass of the raft is 68.4 kg
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