Structural Steel Design (6th Edition)
6th Edition
ISBN: 9780134589657
Author: Jack C. McCormac, Stephen F. Csernak
Publisher: PEARSON
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Question
Chapter 7, Problem 7.13PFS
To determine
The lightest W10 shape column AB for the given pinned base unbraced-moment frame.
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س 1 تم أخذ قرار استثماري من قبل احدى الشركات المتخصصة في مجال البيئة والطاقة بالدخول في مشروع
انشاء ابنية مستدامة وثبتت الشركة رغبتها بالحصول على عائد سنوي ثابت مقداره 50,000 دولار لمدة
ثمانية سنوات بالاضافة الى عائد يغطي سداد ايجار مقر الشركة مقداره 35,000 دولار كل اربع سنوات, فاذا
كانت المصاريف التشغيلية السنوية 20,000 دولار و نسبة الفائدة 10% % ماهو المبلغ الواجب استثماره
من قبل الشركة لغرض تحقيق هذه العوائد؟
س2/ احسب القيمة المستقبلية المكافئة ( Future worth value ) للمشروع الاستثماري المبينة بياناته
الاقتصادية في ادناه
رأس المال Investment Cost
الفقرة
تكاليف التشغيل السنوية Annual Operating Cost
العوائد السنوية Annual Revenue
عمر المشروع Useful life
Interest rate
نسبة الفائدة
Inflation rate نسبة التضخم
المبلغ ($)
800,000
30,000
150,000
10 years
12%
4%
Resuelve el problema uno
A lagoon with volume 1,300 m3 has been receiving a steady flow of a non-conservative waste (rate constant= 0.19/day) at a rate of 80 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 12 mg/L.
A. What would be the concentration of pollutant in the effluent leaving the lagoon?
B. If the input waste concentration suddenly increased to 110 mg/L, what would the concentration in the effluent be 8 days later?
Chapter 7 Solutions
Structural Steel Design (6th Edition)
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