Engineering Fundamentals: An Introduction to Engineering
6th Edition
ISBN: 9780357112311
Author: Saeed Moaveni
Publisher: Cengage Learning US
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Chapter 11, Problem 45P
To determine
Find the degree-days for the month of October 2018.
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What is the airport reference temperature, if the monthly mean of average daily temperature for
the hottest month of a study year = 24°C and the monthly mean of the maximum daily
temperature for the same month of the same year = 30°C
At a certain station, the mean of the average
temperature is 25°C and mean of the
maximum daily temperature is 46°C . What
is the airport reference temperature ?
Example 1.6: If the monthly mean of average daily temperature and monthly
mean of maximum daily temperature of the hottest month of the year are
38°C and 47°C, respectively, then airport reference temperature is:
(a) 38 °C
(b) 41 °C
(c) 47 °C
(d) 50 °C
Ch=
Chapter 11 Solutions
Engineering Fundamentals: An Introduction to Engineering
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
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- The monthly mean temperature of maximum daily temperature and monthly mean of average daily temperature of the hottest month of year are 52 degree Celsius and 40 degree Celsius respectively. Then airport reference temperature is?arrow_forwardAt a climate station, air pressure is measured as 100 kPa, air temperature as 24°C, and the wet-bulb or dew point temperature as 19°C. Calculate the corresponding relative humidity in percent.arrow_forwardDuring winter, when people are in a well-insulated house,they usually feel comfortable if the air temperature is near22°C (72°F). If you have ever spent a night in a poorly insulatedcabin in winter, however, you will recognize that paradoxically,when people are in poorly insulated buildings, they often feelchilly even when the air inside is heated to 22°C or higher. Oneimportant reason for the difference in how warm people feel inthe two sorts of buildings is that even if a well-insulated andpoorly insulated building are identical in the air temperatureinside, they differ in thermal-radiation heat transfer. Specifically,a person standing in the two types of buildings experiencesdifferent heat exchange by thermal radiation in the two. Explainhow thermal-radiation heat transfer accounts for the sense ofchill in the poorly insulated building. (Hint: Think of the outerwalls of the two types of buildings, and think specifically of thetemperatures of the interior surfaces of those walls.)arrow_forward
- 3. A thermometer reading 10°C is brought into a room where the temperature is 18°C ; 1 minute later the thermometer reading is 14°C. how long does it take until the reading becomes 16°C.arrow_forwardA thermometer reading 18°F is brought into a room where the temperature is 70°F. One minute later the thermometer reading is 31°F. Determine the: a) temperature reading as a function of time b) temperature reading 5 minutes after the thermometer is first brought into the room.arrow_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
- The term for an urban or metropolitan area that is significantly warmer than its surrounding rural areas due to human activities is A. urban sprawl B. urban heat island effect C. heat pollution D. none of the abovearrow_forwardH.W/a glass of a hot water has an initial temperature of 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 minute .At what time the water cool down to 40°C ?arrow_forwardIn order to compute the airport reference temperature and the standard temperature with respect to elevation, the monthly mean of average daily temperature and the monthly mean of the maximum daily temperature of the hottest month of the year is found to be 32° C and 41,5° C respectively. The airport reference temperature is:arrow_forward
- Calculate the density of air at standard conditions (T - 25 °C and P a 1 atm).arrow_forwardDuring the midday 2pm, the temperature of the water that is left out on a table is 18° If the temperature of the surrounding is 34°C and the water’s temperature heated up to 26°C at 2:25pm. After how many minutes will the water’s temperature be 32°C?arrow_forward2.19 Determine the change in the kinematic viscosity of air that is heated from 10°C to 70°C. Assume standard atmospheric pressure.arrow_forward
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