Concept explainers
(a)
Find the amount of radiation emitted from a hot pavement in Arizona.
(a)
Answer to Problem 35P
In SI units, The amount of radiation emitted from a hot pavement in Arizona is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Formula used:
The relationship between degree Celsius
Here,
The formula for the amount of radiant energy emitted by a surface is,
Here,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, The amount of radiation emitted from a hot pavement in Arizona is
Conclusion:
Hence, in SI units, The amount of radiation emitted from a hot pavement in Arizona is
(b)
Find the amount of radiated emitted from a hood of a car.
(b)
Answer to Problem 35P
In SI units, The amount of radiation emitted from a hood of a car is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, the amount of radiation emitted from a hood of a car is
Conclusion:
Hence, in SI units, the amount of radiation emitted from a hood of a car is
(c)
Find the amount of radiated emitted from a sunbather.
(c)
Answer to Problem 35P
In SI units, The amount of radiation emitted from a sunbather is
Explanation of Solution
Given data:
Area of the surface,
Emissivity of the surface,
Temperature of the surface,
Calculation:
Substitute
Substitute
Do the unit conversion in above result,
Therefore, in SI units, the amount of radiation emitted from a sunbather is
Conclusion:
Hence, in SI units, the amount of radiation emitted from a sunbather is
Want to see more full solutions like this?
Chapter 11 Solutions
Bundle: Engineering Fundamentals: An Introduction To Engineering, Loose-leaf Version, 6th + Webassign, Single-term Printed Access Card
- Calculate the heat loss from a double-pane glass window consisting of two pieces of glass, each having a thickness of 10 mm with a thermal conductivity of k = 1.3 W/m.K . The two glass panes are separated by an air gap of 7 mm. Assume thermal conductivity of air to be k = 0.022 W/m.K .arrow_forwardAssume 40% of the light emitted by a 1000 W metal halide lamp (110,000 lm) illuminates a surface with the area of a 32-ft diameter. 1. Determine the average illuminance of the surface in foot candles. 2. Determine the average illuminance of the surface in lux.arrow_forward) Given that the thermal conductivity k = 1.8 W/m.°C, and L TT kAq 1 2 Determine the heat-transfer rate (q) from an electronic chip whose surface temperature is 60°C and has an exposed surface area (A) of 50 cm2 and the thickness (L) is 18 mm. The temperature of the surrounding air is 20 °C.arrow_forward
- 1 Let the reverberation time be 1.5 s for an empty hall and 1.3 s when a curtain cloth of 20 m2 is suspended at the centre of the hall. If the dimensions of the hall are 10mx8mx6m, calculate the coefficient of absorption of the curtain cloth. What area of the empty hall wall should be covered by the similar curtain cloth so as to reduce the reverberation time to 1.1 s?arrow_forwardA 50 m length of tape is of standard length at temperature of 50.76°C. What would be the error in the length of tape at a temp. of 68°C. Use coefficient of thermal expansion equal to 0.0000116m/°C. a. 0.01 b. 0.02 c. 0.03 d. 0.04arrow_forwardConvert 15.14 poises to kinematic viscosity in square meter per second if the liquid has a specific gravity of 0.964arrow_forward
- Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning