Specific heat of aluminum when 26400 J of energy is supplied to 2 kg block and it's temperature rises from 20 °C to 35 °C is
1000 J kg-1 K-1
70 J kg-1 K-1
400 J kg-1 K-1
880 J kg-1 K-1
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The acceleration of a rocket having mass 5000 kg and resultant force acting on it is 200 000 N is
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