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12 June, 01:14

An adiabatic closed system is accelerated from 0 m/s to 30 m/s. Determine the specific energy change of this system, in kJ/kg.

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  1. 12 June, 03:48
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    initial velocity, u = 0 m/s

    final velocity, v = 30 m/s

    Let the mass is m.

    Initial kinetic energy, Ki = 1/2 mu² = 0

    Final kinetic energy, Kf = 1/2 mv² = 0.5 m x 30 x 30 = 450 m

    Specific energy change = change in kinetic energy per unit mass

    = 450 m / m = 450 J/kg = 0.45 kJ/kg
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