Essential University Physics Plus Mastering Physics with eText -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780321975973
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 16, Problem 64P
You’re considering purchasing a new sleeping bag whose manufacturer claims will keep you warm to −10°F. The bag has down insulation with 4.0-cm loft (thickness). Your body produces heat at the rate of 100 W and has area 1.5 m2. Considering only
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Essential University Physics Plus Mastering Physics with eText -- Access Card Package (3rd Edition)
Ch. 16.1 - Is there (a) no temperature, (b) one temperature,...Ch. 16.2 - A hot rock with mass 250 g is dropped into an...Ch. 16.3 - The figure shows three slabs with the same...Ch. 16.3 - Prob. 16.4GICh. 16.4 - A houses thermostat fails, leaving the furnace...Ch. 16 - If system A is not in thermodynamic equilibrium...Ch. 16 - Does a thermometer measure its own temperature or...Ch. 16 - Compare the relative sizes of the kelvin, the...Ch. 16 - If you put a thermometer in direct sunlight, what...Ch. 16 - Why does the temperature in a stone building...
Ch. 16 - Why do large bodies of water exert a...Ch. 16 - A Thermos bottle consists of an evacuated,...Ch. 16 - Stainless-steel cookware often has a layer of...Ch. 16 - Prob. 9FTDCh. 16 - Prob. 10FTDCh. 16 - Glass and fiberglass are made from the same...Ch. 16 - To keep your hands warm while skiing, you should...Ch. 16 - Since Earth is exposed to solar radiation, why...Ch. 16 - Global warming at Earths surface is generally...Ch. 16 - In its 2014 report, the Intergovernmental Panel on...Ch. 16 - A Canadian meteorologist predicts an overnight low...Ch. 16 - Normal room temperature is 68F. Whats this in...Ch. 16 - Prob. 18ECh. 16 - At what temperature do the Fahrenheit and Celsius...Ch. 16 - The normal boiling point of nitrogen is 77.3 K....Ch. 16 - Prob. 21ECh. 16 - Prob. 22ECh. 16 - Prob. 23ECh. 16 - Whats the specific heat of a material if it takes...Ch. 16 - The average human diet contains about 2000 kcal...Ch. 16 - Prob. 26ECh. 16 - You bring a 350-g wrench into the house from your...Ch. 16 - Prob. 28ECh. 16 - Building heat loss in the United States is usually...Ch. 16 - Find the heat-loss rate through a slab of (a) wood...Ch. 16 - The top of a steel wood stove measures 90 cm by 40...Ch. 16 - Youre a builder whos advising a homeowner to have...Ch. 16 - An 8.0 m by 12 m house is built on a concrete slab...Ch. 16 - Find the -factor for a wall that loses 0.040 Btu...Ch. 16 - Compute the -factors for 1-inch thicknesses of...Ch. 16 - A horseshoe has surface area 50 cm2, and a...Ch. 16 - An oven loses energy at the rate of 14 W per C...Ch. 16 - Youre having your homes heating system replaced,...Ch. 16 - The filament of a 100-W lightbulb is at 3.0 kK....Ch. 16 - A typical human body has surface area 1.4 nr and...Ch. 16 - A constant-volume gas thermometer is filled with...Ch. 16 - A constant-volume gas thermometer is at 55-kPa...Ch. 16 - In Fig. 16.2s gas thermometer, the height h is...Ch. 16 - Prob. 44PCh. 16 - Typical fats contain about 9 kcal per gram. If the...Ch. 16 - A circular lake 1.0 km in diameter is 10 m deep...Ch. 16 - How much heat is required to raise an 800-g copper...Ch. 16 - Initially, 100 g of water and 100 g of another...Ch. 16 - Prob. 49PCh. 16 - Two neighbors return from Florida to find their...Ch. 16 - Prob. 51PCh. 16 - Prob. 52PCh. 16 - Prob. 53PCh. 16 - The temperature of the eardrum provides a reliable...Ch. 16 - Prob. 55PCh. 16 - Your young niece complains that her cocoa, at 90C,...Ch. 16 - A piece of copper at 300C is dropped into 1.0 kg...Ch. 16 - While camping, you boil water to make spaghetti....Ch. 16 - A biology labs walk-in cooler measures 3.0 m by...Ch. 16 - One end of an iron rod 40 cm long and 3.0 cm in...Ch. 16 - Prob. 61PCh. 16 - An electric stove burner has surface area 325 cm2...Ch. 16 - An electric current passes through a metal strip...Ch. 16 - Youre considering purchasing a new sleeping bag...Ch. 16 - A blacksmith heats a 1.1-kg iron horseshoe to...Ch. 16 - Whats the power output of a microwave oven that...Ch. 16 - A cylindrical log 15 cm in diameter and 65 cm long...Ch. 16 - A blue giant star whose surface temperature is 23...Ch. 16 - Prob. 69PCh. 16 - A black wood stove with surface area 4.6 nr is...Ch. 16 - Estimate the average temperature on Pluto,...Ch. 16 - Prob. 72PCh. 16 - Prob. 73PCh. 16 - Prob. 74PCh. 16 - Prob. 75PCh. 16 - In a cylindrical pipe where area isnt constant....Ch. 16 - Prob. 77PCh. 16 - Prob. 78PCh. 16 - Prob. 79PCh. 16 - Use the method outlined in Problem 76 to show that...Ch. 16 - A house is at 20C on a winter night when the...Ch. 16 - A more realistic approach to the solar greenhouse...Ch. 16 - Fiberglass is a popular, economical, and fairly...Ch. 16 - Fiberglass is a popular, economical, and fairly...Ch. 16 - Fiberglass is a popular, economical, and fairly...Ch. 16 - Fiberglass is a popular, economical, and fairly...
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- During 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_forwardFor the human body, what is the rate of heat transfer by conduction through the body's tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 , and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)arrow_forwardA high-end gas stove usually has at least one burner rated at 14 000 Btu/h. (a) If you place a 0.25-kg aluminum pot containing 2.0 liters of water at 20.C on this burner, how long will it take to bring the water to a boil, assuming all the heat from the burner goes into the pot? (b) Once boiling begins how much time is required to boil all the water out of the pot?arrow_forward
- An astronaut performing an extra-vehicular activity (space walk) shaded from the Sun is wearing a spacesuit that can be approximated as perfectly white ( e=0 ) except for a 5 cm × 8 cm patch in the form of the astronaut's national flag. The patch has emissivity 0.300. The spacesuit under the patch is 0.500 cm thick, with a thermal conductivity k 0.0600 W/m , and its inner surface is at a temperature of 20.0 . What is the temperature of the patch, and what is the rate of heat loss through it? Assume the patch is so thin that its outer surface is at the same temperature as the outer surface of the spacesuit under it. Also assume the temperature of outer space is 0 K. You will get an equation that is very hand to solve in closed form, so can solve it numerically with a graphing calculator, with software, or even by trial and error with a calculator.arrow_forwardOne easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose a single-story cubical house already had 15 cm of fiberglass insulation in the attic and in all the exterior surfaces. If you added an extra 8.0 cm of fiberglass to the attic, by what percentage would the heating cost of the house drop? Take the house to have dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors, and assume that the interior is uniformly at one temperature and the exterior is uniformly at another.arrow_forwardA brass rod (Y=90109N/m2), with a diameter of 0.800 cm and a length of 1.20 m when the temperature is 25 , is fixed at both ends. At what temperature is the force in it at 36,000 N?arrow_forward
- At high noon, the Sun delivers 1 000 W to each square meter of a blacktop road. If the hot asphalt transfers energy only by radiation, what is its steady-state temperature?arrow_forwardThe thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about 0.20 W/m K and 0.020 W/m K, respectively, while other tissues inside the body have conductivities of about 0.50 W/m K. Assume that between the core region of the body and the skin sin face lies a skin layer of 1.0 mm, fat layer of 0.50 cm, and 3.2 cm of other tissues. (a) Find the R-factor for each of these layers, and the equivalent R-factor for all layers taken together, retaining two digits. (b) Find the rate of energy loss when the core temperature is 37C and the exterior temperature is 0C. Assume that both a protective layer of clothing and an insulating layer of unmoving air a absent, and a body area of 2.0 m2.arrow_forwardOn a hot day, the temperature of an 80,000L swimming pool increases by 150C. What is the net heat transfer during this healing? Ignore any complications, such as loss of water by evaporation.arrow_forward
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