1. A farmer applies nitrogen to a crop from a tank pressurized to 1000 kPa absolute at a temperature of 25-C. What minimum temperature can be expected in the nitrogen if it is released to the atmosphere? Answer: -119°C (Use: k=1.4) 2. A lin diameter soap bubble has an internal pressure 0.0045 lb/in? greater than that of the outside atmosphere. Compute the surface tension of the soap-air interface. Note that a soap bubble has two interfaces with air, an inner and outer surface of nearly the same radius. Answer: 0.00675 lb/ft

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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1. A farmer applies nitrogen to a crop from a tank pressurized to 1000 kPa absolute at a temperature
of 25-C. What minimum temperature can be expected in the nitrogen if it is released to the
atmosphere?
Answer: -119°C (Use: k-1.4)
2. A lin diameter soap bubble has an internal pressure 0.0045 lb/in? greater than that of the outside
atmosphere. Compute the surface tension of the soap-air interface. Note that a soap bubble has two
interfaces with air, an inner and outer surface of nearly the same radius.
Answer: 0.00675 lb/ft
Transcribed Image Text:1. A farmer applies nitrogen to a crop from a tank pressurized to 1000 kPa absolute at a temperature of 25-C. What minimum temperature can be expected in the nitrogen if it is released to the atmosphere? Answer: -119°C (Use: k-1.4) 2. A lin diameter soap bubble has an internal pressure 0.0045 lb/in? greater than that of the outside atmosphere. Compute the surface tension of the soap-air interface. Note that a soap bubble has two interfaces with air, an inner and outer surface of nearly the same radius. Answer: 0.00675 lb/ft
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