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A) How much heat needes to be taken from 0.5 kg of ethyl alcohol as a gas at its boiling point of 78 C to a solid at its freezing point -114 C if the latent heat of vaporization is 850,000 J/kg and its latent heat of fusion is 104,000 J/kg and the specific heat is 2400 J?
B) If a piece of irion (c=450 J/ kg C) at 65 C is dropped into 0.250 kg of ethyl acohol at 25 C and the final temperature of the two comes to 35 C what was the mass of the piece of iron?
C) if 0.35 kg of solid ethyl alcohol at -114.0 C is put in a large wll insulated jug holding 2.5 kg of liquid ethyl alcohol initially at 35 C what will the final temperature be after all the solid form has melted and come to equilibrium?
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 9 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the vacuum cleaner.
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After the interaction, the particles (which can't be distinguished) are observed moving at angles 55.3° and 34.7°, both angles being measured with respect to the original direction of motion. Illustrate what are the final speeds of the particles?..
A bullet shot straight up into the air returns to it's starting point in 10 seconds. What is the initial speed of the bullet
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