ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 11, Problem 8P
To determine
Calculate the thermal conductivity of the insulating material, and also determine the insulation thickness of R-30 and R-40 materials.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Questions:
2nd: Calculate the thermal resistance (R or R₂) of human skin with a
thickness of 2 cm, per cm² of skin.
●
thermal conductivity=0.627 N/(°C.s)
●
• specific heat-c-3470 Nm/kg °C
• density=1100 kg/m³
Rt
-
L
KA
where
k is the materials conductivity [W.m³!.K-¹]
L is the plane thickness [m]
A is the plane area [m²]
Which of the following statements is/are CORRECT?
1.
Transmittance is directly proportional to absorbance.
2.
Transmittance is proportional to the analyte concentration.
3.
Transmittance is equal to the transmitted light intensity divided by the incident light intensity.
2. A Platinum resistance thermometer has a resistance of 100 ohms at 0°C and the
value of alpha is 0.00385. In operation the resistance is 101 ohms. Calculate the
temperature.
Chapter 11 Solutions
ENGINEERING FUNDAMENTALS
Ch. 11.2 - Prob. 1BYGCh. 11.2 - Prob. 2BYGCh. 11.2 - Prob. 3BYGCh. 11.2 - Prob. 4BYGCh. 11.2 - Prob. 5BYGCh. 11.2 - Prob. BYGVCh. 11.4 - Prob. 1BYGCh. 11.4 - Prob. 2BYGCh. 11.4 - Prob. 3BYGCh. 11.4 - Prob. 4BYG
Ch. 11.4 - Prob. BYGVCh. 11.6 - Prob. 1BYGCh. 11.6 - Prob. 2BYGCh. 11.6 - Prob. 3BYGCh. 11.6 - Prob. 4BYGCh. 11.6 - Prob. BYGVCh. 11 - Prob. 1PCh. 11 - Prob. 2PCh. 11 - Alcohol thermometers can measure temperatures in...Ch. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Calculate the R-value for the following materials:...Ch. 11 - Calculate the thermal resistance due to convection...Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - Estimate the change in the length of a power...Ch. 11 - Calculate the change in 5 m long copper wire when...Ch. 11 - Prob. 16PCh. 11 - Prob. 17PCh. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Prob. 23PCh. 11 - Prob. 24PCh. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - For Problems 11.11, 11.12, and 11.13, calculate...Ch. 11 - Prob. 37PCh. 11 - Prob. 38PCh. 11 - Prob. 39PCh. 11 - Prob. 40PCh. 11 - Prob. 41PCh. 11 - Prob. 42PCh. 11 - Prob. 43PCh. 11 - Prob. 44PCh. 11 - Prob. 45PCh. 11 - Prob. 46PCh. 11 - Prob. 47PCh. 11 - Prob. 48PCh. 11 - Prob. 49PCh. 11 - Prob. 51PCh. 11 - Prob. 52PCh. 11 - Prob. 53PCh. 11 - Prob. 54PCh. 11 - Prob. 55P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- a. What is shown in the figure? Where is it used and how does it work? b. What is the nature of heat exchange process, and why is this suitable? c. What is the relative direction of fluid motion?arrow_forward12. Thermal efficiency using temperature values 13. Thermal efficiency using rc and k valuesarrow_forward3. A combined separating and wire-drawing calorimeter was used to measure the dryness fraction of steam supplied to a steam engine. The following observations were made: Pressure of steam in steam pipe Temperature of steam inside the wire-drawing calorimeter 110 deg C Pressure of steam inside the wire-drawing calorimeter 136mm of water Barometer reading Steam used by the steam engine Water collected in the separating calorimeter Steam condensed on leaving the wire-drawing calorimeter 7bar 750mm of mercury 55kg 1kg 6.5kgarrow_forward
- 3. According to Newton's Law of cooling', the rate at which the heat is lost by a heated body is proportional to the difference in temperature between the body and the surrounding medium (when the temperatutre difference is very small). If a thermometer is taken outdoor, where the temperature is 6°C, from a room which temperature is 25C, and the reading drops 15°C in one minute, how long after its removal from the room will the reading be 8°C? after 45 secs what is the thermometer reading?arrow_forward4. An incandescent lamp has a tungsten filament whose resistance is 96 ohm at its operating temperature of 2900°C. Calculate the filament resistance when the lamp is disconnected from the electric source under which conditions the temperature is 24°C.arrow_forwardYour answer is partially correct. An aluminum-alloy rod has a length of 8.1814 cm at 14.00°C and a length of 8.1942 cm at the boiling point of water. (a) What is the length of the rod at the freezing point of water? (b) What is the temperature if the length of the rod is 8.1916 cm? th (a) Number i 817.931 Units cm (b) Number 82.5318 Units °Carrow_forward
- A blacksmith immersed a piece of steel at 600°F into a large bucket of water with a temperature of 65°. After 1 minute the temperature of the steel was 200°. How much longer must the steel remain immersed to bring its temperature down to 97°? The steel must remain immersed ☐ more minute(s). (Round to the nearest tenth as needed.)arrow_forwardPROBLEM 3. The assembly shown constructed from a steel bolt with a diameter of 8 mm and fits and a magnesium sleeve with an inner diameter of 10 mm and an outer diameter of 12 mm. The length of the sleeve is 150 mm. The assembly is originally at a temperature of T1 temperature is raised to a final value of T2 = 120°C. If there is gap of 0.1 mm between sleeve and the rigid washer at end B before the heating, determine the average normal stress in the bolt and the = 20°C and then the sleeve. Est = 200 GPa, Emg = 44.7 GPa, a,t = 14(10°)/°C, amg = 26(10)/"C. Rigid washers 150 mm 0,1 mmarrow_forwardA glass of a hot water has an initial temperature 80°C, placed in a room where the temperature is 30°C. After one minute the water temperature drops to 70°C. What will be the temperature after 3 minutes? At what time the water cools down to 40°C?arrow_forward
- A nozzle is a device for increasing the velocity of a steadily flowing stream of fluid. At the inlet to a certain nozzle, the specific enthalpy of the fluid is 3320 kJ/kg and the velocity is 60 m/s. At the exit from the nozzle the specific enthalpy is 2530 kJ/kg. The nozzle is horizontal, and the heat supply, the heat loss, the work input, and the work output to or from the nozzle are all negligible. (a) Determine the velocity at the nozzle exitarrow_forward2. The cylinder shown in figure 2 is made from a uniform material. What is its specific weight? Kerosene at 25°C(SG=0.823) 750 mmi 600 mm 400 mm Figure 2arrow_forwardA tungsten lamp filament has a temperature of 20.5 degrees Celsius and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature of 25 degrees Celsius. RTC at 0 degree Celsius is 0.005/°C. * Your answerarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning