Essential University Physics
4th Edition
ISBN: 9780134988559
Author: Wolfson, Richard
Publisher: Pearson Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 16, Problem 56P
The temperature of the eardrum provides a reliable measure of deep body temperature and is measured quickly with ear thermometers that sense infrared
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The quantity of energy Q transferred by heat conduction through an insulating pad in time interval Δt is described by Q/Δt = κAΔT/d, where κ is the thermal conductivity of the material, A is the face area of the pad (perpendicular to the direction of heat flow), ΔT is the difference in temperature across the pad, and d is the thickness of the pad. In one trial to test material as lining for sleeping bags, 86.0 J of heat is transferred through a 3.40-cm-thick pad when the temperature on one side is 37.0°C and on the other side is 2.00°C. In a trial of the same duration with the same temperatures, how much heat will be transferred when more of the material is added to form a pad with the same face area and total thickness 8.41 cm?
Problem 1:
How long does it take to heat a cup of coffee in a 1000-Watt microwave oven? This means that
energy is used at the rate of 1000 Joules per second. Assume that the coffee starts at a normal
room temperature of 25°C.
Step 1: Guess an answer.
Step 2: Estimate the volume of the coffee in mL and the final temperature that you want to
attain.
Step 3: Assume coffee has the same density and thermal properties of water. Find its heat
capacity (specific heat times mass) in appropriate units.
Step 4: Use the heat capacity and the desired temperature change to find the energy
required.
Step 5: Calculate the time required using the energy and the microwave power. Pay
attention to units and use Power = Energy/time.
Step 5: Is your answer reasonable?
A scientist is working with 19 meters of gold wire. How long is the wire in millimeters? Be sure to include the correct unit in your answer.
Chapter 16 Solutions
Essential University Physics
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 - 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 - Stainless-steel cookware often has a layer of...Ch. 16 - Prob. 7FTDCh. 16 - Glass and fiberglass are made from the same...Ch. 16 - To keep your hands warm while skiing, you should...Ch. 16 - Global warming at Earths surface is generally...Ch. 16 - Prob. 11ECh. 16 - A Canadian meteorologist predicts an overnight low...Ch. 16 - Normal room temperature is 68F. Whats this in...Ch. 16 - Prob. 14ECh. 16 - At what temperature do the Fahrenheit and Celsius...Ch. 16 - The normal boiling point of nitrogen is 77.3 K....Ch. 16 - Prob. 17ECh. 16 - Prob. 18ECh. 16 - Prob. 19ECh. 16 - Whats the specific heat of a material if it takes...Ch. 16 - The average human diet contains about 2000 kcal...Ch. 16 - Prob. 22ECh. 16 - Prob. 23ECh. 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 - 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 - Example 16.2: An iron frying pan of mass 2.65 kg...Ch. 16 - Prob. 36ECh. 16 - Example 16.2: During the refueling of a nuclear...Ch. 16 - Prob. 38ECh. 16 - Example 16.7: A solar greenhouse has 435 ft2 of...Ch. 16 - Prob. 40ECh. 16 - Example 16.7: An asteroid in the belt between Mars...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. 46PCh. 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. 51PCh. 16 - Two neighbors return from Florida to find their...Ch. 16 - Prob. 53PCh. 16 - In the 2011 nuclear accident at Fukushima, Japan,...Ch. 16 - Prob. 55PCh. 16 - The temperature of the eardrum provides a reliable...Ch. 16 - Prob. 57PCh. 16 - Prob. 58PCh. 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. 63PCh. 16 - An electric stove burner has surface area 325 cm2...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. 71PCh. 16 - Prob. 72PCh. 16 - Estimate the average temperature on Pluto,...Ch. 16 - Prob. 74PCh. 16 - Prob. 75PCh. 16 - Prob. 76PCh. 16 - Prob. 77PCh. 16 - In a cylindrical pipe where area isnt constant....Ch. 16 - Prob. 79PCh. 16 - Prob. 80PCh. 16 - A passive solar house has south-facing windows...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...
Additional Science Textbook Solutions
Find more solutions based on key concepts
28. As the earth mates, what is the speed of (a) a physics student in Miami. Florida. at latitude 26°, and (b) ...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
21. Two -diameter aluminum electrodes are spaced apart.
The electrodes are connected to a battery.
...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Express the unit vectors in terms of (that is, derive Eq. 1.64). Check your answers several ways Also work o...
Introduction to Electrodynamics
Super-Earth. You’ve discovered a super-Earth orbiting a Sunlike star at the distance of Jupiter. Is it possible...
Life in the Universe (4th Edition)
2. Plastic and glass rods that have been charged by rubbing with wool and silk, respectively, hang by threads.
...
College Physics: A Strategic Approach (3rd Edition)
During a hailstorm, hailstones with an average mass of 2 g and a speed of 15 m/s strike a window pane at 45 ang...
An Introduction to Thermal Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- In 2011, artist Hans-Peter Feldmann covered the walls of a gallery at the New York Guggenheim Museum with 100,000 one-dollar bills (Fig. P1.48). Approximately how much would it cost you to wallpaper your room in one-dollar bills, assuming the bills do not overlap? Consider the cost of the bills alone, not other supplies or labor costs. FIGURE P1.48arrow_forward(a) Taking A = (6.00 î – 8.00 j) units, B = (-8,00 Î + 3.00 j) units, and C = (26.0 î + 19.0 ĵ) units, determine a and b such that a à + b B + T = 0. (b) A student has learned that a single equation cannot be Figure P22 solved to determine values for more than one unknown in it. How would you explain to him that both a and b can be determined from the single equation used in part (a)?arrow_forwardNewton's Law of Cooling tells us that the rate of change of the temperature of an object is proportional to the temperature difference between the object and its surroundings. This can be modeled by the differential equation dT = k(T – A), where T is the temperature of the object after t units of time have passed, A is the ambient dt temperature of the object's surroundings, and k is a constant of proportionality. Suppose that a cup of coffee begins at 179 degrees and, after sitting in room temperature of 66 degrees for 15 minutes, the coffee reaches 169 degrees. How long will it take before the coffee reaches 156 degrees? Include at least 2 decimal places in your answer.arrow_forward
- According to the Ideal Gas Law, PV = KT, where P is pressure, V is volume, T is temperature (in kelvins), and k is a constant of proportionality. A tank contains 1300 cubic inches of nitrogen at a pressure of 40 pounds per square inch and a temperature of 300 K. (a) Determine k. k = (b) Write P as a function of V and T and describe the level curves. P = Setting P = c, the level curves are of the form V =arrow_forward0²T მე2 ƏT B- Ət You know that T is temperature (K) and x is the x-coordinate, which is measured in meters. You also know that t is time (s) and the book uses à as the symbol for thermal conductivity, whose unit is W/m.K. What must be the units of Q and ß?arrow_forwardA thermometer is taken from a room where the temperature is 18°C to the outdoors, where the temperature is 2°C. After one minute the thermometer reads 13°C. (a) What will the reading on the thermometer be after 4 more minutes? 3.83 (b) When will the thermometer read 3°C? 5.01 minutes after it was taken to the outdoors.arrow_forward
- The tungsten filament of an incandescent light bulb has a temperature of approximately 3000 K. The emissivity of tungsten is approximately 1/3, and you may assume that it is independent of wavelength. If the bulb gives off a total of 100 watts, what is the surface area of its filament in square millimeters?arrow_forwardOur classroom was kept at 25.0°C during your experiment, so v is predicted to be 346 m/s. One group of students measured V=343 m/s. What is the percentage error of their measurement? Don't enter the 1% sign in your answer, just the number in front of the "%" sign. Your Answer: Answerarrow_forwardAccording to the Ideal Gas Law, PV = kT, where P is pressure, Vis volume, T is temperature (in Kelvins), and k is a constant of proportionality. A tank contains 2000 cubic inches of nitrogen at a pressure of 26 pounds per square inch and a temperature of 600 K. Determine the EXACT value of k.arrow_forward
- Compact florescent light bulbs save energy when compared to traditional incandescent bulbs. Our green energy campaign includes efforts to get local residents to change their incandescent bulbs to florescent bulbs. Initially 184 households make the change. Market studies suggest that, in the absence of limiting factors, we could increase that number by 28% each month. In our target area, there are 246,744 households, which we take as the limiting value. Make a logistic model that gives the number of households converting to florescent bulbs after t months. (Use t as your variable. Round r to three decimal places.)arrow_forwardIdeal gases are often studied at standard ambient temperature and pressure (SATP). The International Union of Pure and Applied Chemistry (IUPAC) defines SATP to be T = 25° C and P = 100 kPa. a. Calculate N/V (in particles per cubic meter) for an ideal gas at SATP b. How many atoms of an ideal gas at SATP are there in one cubic centimeter?arrow_forwardA = (6.00i – 8.00j) units, 37. QC (a) (-8.00i + 3.00j) units, and C= (26.0i + 19.0j) units, determine a and b such that aA + bB + Ć = 0. (b) A stu- dent has learned that a single equation cannot be solved to determine values for more than one unknown in it. How you explain to him that both a and b can be deter- mined from the single equation used in part (a)? Taking wouldarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Heat Transfer: Crash Course Engineering #14; Author: CrashCourse;https://www.youtube.com/watch?v=YK7G6l_K6sA;License: Standard YouTube License, CC-BY