Problem 2.3 The following problem can be solved using the generalized conservation and accounting principle to determine if a recycling plant is profitable annually. Operating information: • The plant operates 9 hours each day, 5 days each week, and 48 weeks each year. The plant purchases 30 tons of aluminum (at a rate of $0.02/lb) during each operating week. • The plant has 5 full-time employees who are paid $18 per hour. All employees work during all of the plant's operating hours. The plant produces 7 bales of recycled aluminum per day, which it sells for $950 per bale. [Note: 1 ton = 2000 lb]

Problem 2.3 The following problem can be solved using the generalized conservation and accounting principle to determine if a recycling plant is profitable annually. Operating information: • The plant operates 9 hours each day, 5 days each week, and 48 weeks each year. The plant purchases 30 tons of aluminum (at a rate of $0.02/lb) during each operating week. • The plant has 5 full-time employees who are paid $18 per hour. All employees work during all of the plant's operating hours. The plant produces 7 bales of recycled aluminum per day, which it sells for $950 per bale. [Note: 1 ton = 2000 lb]

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Problem 2.3
The following problem can be solved using the generalized conservation and accounting
principle to determine if a recycling plant is profitable annually.
Operating information:
●
●
The plant operates 9 hours each day, 5 days each week, and 48 weeks each year.
The plant purchases 30 tons of aluminum (at a rate of $0.02/lb) during each operating
week.
The plant has 5 full-time employees who are paid $18 per hour. All employees work
during all of the plant's operating hours.
The plant produces 7 bales of recycled aluminum per day, which it sells for $950 per bale.
[Note: 1 ton = 2000 lb]
Answer the following questions:
(a) Identify the system (in words).
(b) Identify the "stuff" you are accounting for in this analysis.
(c) In order to determine the plant's annual profitability, would one be interested in studying
the instantaneous rate of change in "stuff" (i.e. rate form) or the total change in "stuff"
over an interval (i.e. finite-time form)?
(d) On a system diagram (hint: think dashed lines!), use labeled arrows to identify each
individual input and output of "stuff".
(e) Calculate the amount spent annually on purchasing aluminum.

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