Q8_W06 - H 2 as a function of time for the first 12 hours...

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7B-1 Quiz 8 Name: DL Sec. Last 6 digits of ID # Signature: No books or notes. Calculators OK. Show all your work below. Answers alone do not receive credit! 1. A block of ice at T H 2 0 = 0 ° C is placed in a Styrofoam cooler that sits in a room at T room = 35 ° C. a) Explain how you would calculate the time it takes for this block of ice to melt completely to liquid water. b) Suppose the ice finished melting in exactly 3 hours. In the space below sketch a reasonable graph of T
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Unformatted text preview: H 2 as a function of time for the first 12 hours after you put the ice into the cooler. Put numbers on the axes. T H 2 time c) Explain the physical principles that led to the graph shape you drew above. Useful equations and constants : Δ V = ε battery – IR; Power = Δ (V) I = I 2 R = ( Δ V) 2 / R General transport eq. j = -k (d φ /dx); Δ V capacitor = q/C; Δ E th = mc Δ T Δ E bond = m Δ H Physics 7B Quiz 8 Winter 2006 1...
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This note was uploaded on 09/08/2010 for the course PHY 7B PHY7B taught by Professor Cebra during the Winter '10 term at UC Davis.

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