Calculate the molar heat of vaporization of liqiud nitrogen
60.0g liquid nitrogen(boiling point -196 celcius) is poured in a styrofoam cup containing 200g of water at 55.3 Celcius. Calculate the molar heat of vaporization of liqiud nitrogen if the final temperature of water is 41 Celcius.
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A 130 kg mail bag hangs by a vertical rope 3.2 m long. A postal worker then displaces the bag to a position 2.2 m sideways from its original position, always keeping the rope taut. What horizontal force is necessary to hold the bag in the new posit
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An electron starts from rest at point A and has a speed of 5 106 m/s at poduring this motion. Determine the electric potential difference VA - VB.
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The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Calculate the mass of the aluminum cup.
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