test1a_fall07

# test1a_fall07 - PHY 206 EXAM 1 Sep 26 2007 NAME SIGNATURE...

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PHY 206 EXAM 1 Sep. 26, 2007 NAME: SIGNATURE: ID: 1. 2. 3. 4. 1. 2. 3. 4. Some relations you may need: p + ρgy + 1 2 ρv 2 = const., dQ = mc dT = nCdT Δ L = αL Δ T, Δ V = βV Δ T, Y = F /A Δ L/L , dQ dt = κA Δ T L pV = nRT h K tr i = 3 2 nRT dW = pdV dQ = dU + dW, adiabatic process : pV γ = const . 205L (130)

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1. For the following questions, write your answers in the spaces pro- vided on the front cover of the exam . 1. There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his ﬁnger until help arrived. Which of the following is most likely? [A] The huge size of the Atlantic Ocean makes this impossible. [B] Although the force on his ﬁnger would have been huge, the pressure would have been small enough for this to occur. [C] The force on his ﬁnger would have been very small, likely less than 1N. [D] Both the force and pressure on his ﬁnger would have been great, but not too great for a public-spirited Dutch lad. [E] None of these. 2. A piece of aluminum and a cup of water both have the same tempera- ture. If they are heated so the total energy of each doubles, [A] the water will have a the higher temperature [B] the aluminum will have the higher temperature. [C] both will have the same temperature. [D] not enough information to say. 3. Three chunks of ice are ﬂoating in separate bathtubs, each ﬁlled to the brim with water. Chunk A has large air bubbles in it. Chunk B has unfrozen water in it. Chunk C has an iron railroad spike in it. When the ice melts, what happens? [A] The water level in C will decrease while the other two water levels remain the same. [B] Only the water in C will spill over.
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test1a_fall07 - PHY 206 EXAM 1 Sep 26 2007 NAME SIGNATURE...

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