Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 4, Problem 2PEB
To determine
The amount of heat generated by the current.
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A Thermopane window of area 5 m² is con-
structed of two layers of glass, each 4.4 mm
thick separated by an air space of 3 mm.
If the inside is at 11°C and the outside is
at -24°C, what is the heat loss through the
window? The thermal conductivity of glass is
0.8 W/m .° C and of air is 0.0234 W/m .° C.
Answer in units of kW.
A glass window is 3.7 mm thick, is 2.29 m tall by 1.04 m wide, and has a thermal conductivity of 1.0 W/m K. What is the rate of heat loss (in W) through the window if the inside temperature is 22.3° C and the outside temperature is -20.7 ° C ?
A solid concrete wall has dimensions 4.0 m × 2.4 m and is 30 cm thick. The thermal conductivity of the concrete is 1.3 W/m ∙ K, and it separates a basement from the ground outside. The inner surface of the wall is at 18°C, and the outside surface is at 6°C. How much heat flows through the wall every hour?
Chapter 4 Solutions
Integrated Science
Ch. 4.1 - Prob. 1SCCh. 4.2 - Using the absolute temperature scale, the freezing...Ch. 4.3 - Prob. 3SCCh. 4.3 - Prob. 4SCCh. 4.3 - Prob. 5SCCh. 4.3 - Prob. 6SCCh. 4.3 - Prob. 7SCCh. 4.3 - Prob. 8SCCh. 4.4 - Prob. 9SCCh. 4.4 - Prob. 10SC
Ch. 4.4 - Prob. 11SCCh. 4.4 - Compared to cooler air, warm air can hold a. more...Ch. 4 - What is temperature? What is heat?Ch. 4 - Prob. 2CQCh. 4 - Prob. 3CQCh. 4 - Prob. 4CQCh. 4 - Why is cooler air found in low valleys on calm...Ch. 4 - Prob. 6CQCh. 4 - Prob. 7CQCh. 4 - Prob. 8CQCh. 4 - Prob. 9CQCh. 4 - Prob. 10CQCh. 4 - Prob. 11CQCh. 4 - The relative humidity increases almost every...Ch. 4 - Prob. 13CQCh. 4 - Prob. 14CQCh. 4 - Prob. 15CQCh. 4 - Prob. 16CQCh. 4 - Prob. 17CQCh. 4 - Prob. 18CQCh. 4 - Prob. 19CQCh. 4 - Prob. 1PEACh. 4 - Prob. 2PEACh. 4 - Prob. 3PEACh. 4 - Prob. 4PEACh. 4 - Prob. 5PEACh. 4 - Prob. 6PEACh. 4 - Prob. 7PEACh. 4 - Prob. 8PEACh. 4 - Prob. 9PEACh. 4 - Prob. 10PEACh. 4 - Prob. 11PEACh. 4 - Prob. 12PEACh. 4 - Prob. 1PEBCh. 4 - Prob. 2PEBCh. 4 - Prob. 3PEBCh. 4 - Prob. 4PEBCh. 4 - A 60.0 kg person will need to climb a 10.0 m...Ch. 4 - Prob. 6PEBCh. 4 - Prob. 7PEBCh. 4 - Prob. 8PEBCh. 4 - Prob. 9PEBCh. 4 - Prob. 10PEBCh. 4 - Prob. 11PEBCh. 4 - Prob. 12PEB
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- One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.)arrow_forwardDuring heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled by 2.00C. What is the rate of heat transfer from this forced convection alone, assuming blood has the same specific heat as water and its density is 1050kg/m3 ?arrow_forwardThe specific heat of substance A is greater than that of substance B. Both A and B are at the same initial temperature when equal amounts of energy are added to them. Assuming no melting or vaporization occurs, which of the following can be concluded about the final temperature TA of substance A and the final temperature TB of substance B? (a) TA TB (b) TA TB (c) TA = TB (d) More information is needed.arrow_forward
- The glass of a window has an area of 1.0 m² and is 0.5 cm thick. If the indoor temperature is 20ºC and the outdoor temperature is 5°C, what is the rate of heat flow through this window? [k(glass) = 0.84 J/s.m.°C] 2500 J/s 630 J/s O 1300 J/s O 50,000 J/sarrow_forwardIf the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?. Hint: To get the ΔT (Change in temperature), get the difference between final temperature (Tf) and initial temperature (Ti). [ΔT = Tf – Ti ]arrow_forwardPossibly useful information: The specific heat of (liquid) water is cw = 4186 J/(kg C° ). The heat of fusion for ice or water is L = 3.33 x 105 J/kg The latent heat of vaporization for water is 22.57 x 105 J/kg 1 calorie = 4.186 Joules T (Kelvin) = T (Celsius) + 273 1. A0.040 kg ice cube at 0 Celcius is placed in an insulated box that contains 0.007kg of steam at 100 Celsius. What is the equilibrium temperature reached by the closed system. NOTE: All of the ice melts.arrow_forward
- A rectangular block of aluminum has the following dimensions: 1m x 1m x m. The density of aluminum is 2700kg/m^3. The specific heat of aluminum is 0.9 J/g K. How much does the block of aluminum weigh in Newtons?arrow_forwardA picture window has dimensions of 1.34 m by 2.65 m and is made of glass 5.93 mm thick. On a winter day, the outside temperature is -20°C, while the inside temperature is a comfortable 19.5°C. At what rate is heat being lost through the window by conduction? kglass = 0.80 W/m.K Round your answer to 2 decimal places.arrow_forwardA closed box is filled with dry ice at a temperature of -80.9 oC, while the outside temperature is 28.4 oC. The box is cubical, measuring 0.379 m on a side, and the thickness of the walls is 4.41 × 10-2 m. In one day, 3.66 × 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made.arrow_forward
- A cabin has a 0.159-m thick wooden floor [k = 0.141 W/(m · C°)] with an area of 13.4 m². A roaring fire keeps the interior of the cabin at a comfortable 18.0 °C while the air temperature in the crawl space below the cabin is -16.4 °C. What is the rate of heat conduction through the wooden floor?arrow_forwardA 0.25 kg length of aluminum wire is warmed 10.0 degrees celsius by an electric current. How much heat was generated by the current? (caluminum = 0.22 kcal/kgC)arrow_forwardA coffee-cup calorimeter contains 55.0 g of water at 25.90° C. If 4.21 g gold metal at 89.20° C is placed in the calorimeter, what is the final temperature of the water in the calorimeter? The specific heat of water is 4.184 J/g° C; the specific heat capacity of gold is 0.129 J/g° C.arrow_forward
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