Concept explainers
Suppose you empty a tray of ice cubes into a bowl partly lull of water and cover the bowl. Alter one-halt hour, the contents of the bowl come to thermal equilibrium, with more liquid water and less ice than you started with. Which of the following is true? (a) The temperature of the liquid water is higher than the temperature of the remaining ice. (b) The temperature of the liquid water is the same as that of the ice. (c) The temperature of the liquid water is less than that of the ice. (d) The comparative temperatures of the liquid water and ice depend on the amounts present.
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Chapter 19 Solutions
Physics for Scientists and Engineers, Technology Update, Hybrid Edition (with Enhanced WebAssign Multi-Term LOE Printed Access Card for Physics)
- Consider the latent heat of fusion and the latent heat of vaporization for H2O, 3.33 105 J/kg and 2.256 106 J/kg, respectively. How much heat is needed to a. melt 2.00 kg of ice and b. vaporize 2.00 kg of water? Assume the temperatures of the ice and steam are at the melting point and vaporization point, respectively. (a). UsingEq21.9, Q = mLF = (2.00 kg) (3.33l05 J/kg) = 6.66105 J (b).UsingEq21.10. Q = mLV = (2.00kg) (2.256106 J/kg) = 14.51106 Jarrow_forwardThe height of the Washington Monument is measured to be 170.00 m on a day when the temperature is 35.0 . What will its height be on a day when the temperature falls to -10.0 ? Although the monument is made of limestone, assume that its coefficient of thermal expansion is the same as that of marble. Give your answer to five significant figures.arrow_forwardConsider an object with any one of the shapes displayed in Table 10.2. What is the percentage increase in the moment of inertia of the object when it is warmed from 0C to 100C if it is composed of (a) copper or (b) aluminum? Assume the average linear expansion coefficients shown in Table 16.1 do not vary between 0C and 100C. (c) Why are the answers for parts (a) and (b) the same for all the shapes?arrow_forward
- On his honeymoon, James Joule traveled from England to Switzerland. He attempted to verify his idea of the inter-convertibility of mechanical energy and internal energy by measuring the increase in temperature of water that fell in a waterfall. For the waterfall near Chamonix in the French Alps, which has a 120-m drop, what maximum temperature rise could Joule expect? He did not succeed in measuring it, partly because evaporation cooled the falling water and also because his thermometer was not sufficiently sensitive.arrow_forwardA steel rod is initially 1 meter long at a temperature of 20°C. Assuming that the expansion is uniform along the entire length of the rod , if the coefficient of linear expansion for steel is 11 x 10^-6 per degree Celsius, calculate: a) The change in length of the rod when its temperature is increased to 100°C. b) The final length of the rod at 100°C.arrow_forwardTo illustrate the effect of ice on the aluminum cooling plate, consider the drawing shown here and the data that it contains. Ignore any limitaions due to significant figures. How much heat per second per square meter is conducted through the ice-aluminum combination and through the aluminum by itself?arrow_forward
- A thirsty nurse cools a 2.00 L bottle of a soft drink (mostly water) by pouring it into a large aluminum mug of mass 0.256 kg and adding 0.121 kg of ice initially at -14.8 ∘C. If the soft drink and mug are initially at 20.1 ∘C, what is the final temperature of the system, assuming no heat losses?arrow_forwardA 200.0 g metal container, insulated on the outside, holds 100.0 g of water in thermalequilibrium at 22.0 oC. A 21.0 g ice cube, at the melting point, is dropped into the water. Whenthermal equilibrium is reached, the temperature is 15.0 °C. Assuming there is no heat exchangewith the surroundings, calculate the specific heat for the metal.[Given cwater = 4186.0 J/kg*K and Lf = 3.34 *10^5 J/kg]arrow_forwardA 2.0-kg aluminum block is originally at 10 degrees celcius. If 36 kJ of energy are added to the block, what is its final temperature (in Kelvin)? The specific heat of aluminum is 900 J/kg K The answer (in fundamental SI unit) is ___________ (type the numeric value only)arrow_forward
- The height of the Washington Monument is measured to be 170 m on a day when the temperature is 35oC. What will its height be on a day when the temperature falls to -10.0oC? Although the monument is made of limestone, assume that its thermal coefficient of expansion is the same as marble’s.arrow_forwardTwo bars, A and B, each of length 2.0 m and cross sectional area 1.0 m2, are placed end to end as shown in the figure. The thermal conductivities of the bars are kA = 439 J/(s × m × K) and kB = 887 J/(s × m × K), respectively. The left end of bar A is maintained at 373 K while the right end of B is maintained at 273 K. Which one of the following statements is true concerning the above situation? For a given time t, the amount of heat transferred through bar A is the same as that through B. For a given time t, the amount of heat transferred through bar A is smaller than that through B. For a given time t, the amount of heat transferred through bar A is less than that through B. The time for a quantity of heat Q to pass through bar A is less than that for B. Time is not a factor in determining the quantity of heat conducted through these bars.arrow_forwardOn a certain dry sunny day, a swimming pool’s temperature would rise by 1.50 °C if not for evaporation. What fraction of the water must evaporate to carry away precisely enough energy to keep the temperature constant?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning