A classroom that normally contains 60 people is to be air-conditioned using window air- conditioning units of 4-kW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of 350 kJ/h. There are 12 lightbulbs in the room, each with a rating of 110 W. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 18,000 kJ/h. If the room air is to be maintained at a constant temperature of 19°C, determine the number of window air-conditioning units required.

A classroom that normally contains 60 people is to be air-conditioned using window air- conditioning units of 4-kW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of 350 kJ/h. There are 12 lightbulbs in the room, each with a rating of 110 W. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 18,000 kJ/h. If the room air is to be maintained at a constant temperature of 19°C, determine the number of window air-conditioning units required.

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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Problem 1. Simplify the following expressions (note that 8, is the Kronecker delta, repeated index means summation, and comma represents derivative). (a) Sim Smp Sap (b) ▼ Skmum,n (c) ▼ x 8kmui,mk
Please Fill In the blanks where I have marked red X's using the questions and Image below. 1. On the drawing above, before any geometric controls are applied, what is the coaxility tolerance is implied between the diameters? 2. On the part above, apply datum feature symbols to create a datum axis A-B by using the right and left diamters. 3. Apply a position coaxility between the right and left diamter of 0.1 at MMC. 4. Apply a position tolerance to the large center diameter within a diameter of 0.3 in relation to the single datum axis established by both datum features A and B.
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Use BS 4500A:1970 to determine the dimensional tolerance on the critical diameters in Gear Sub- assembly. The following tolerance should be determined (the limits and fits at each interface will be provided by Canvas): i. Bush & Shaft: Critical Diameter is 35 mm; (H8/f7) ii. Housing & Bush: Critical Diameter is 45 mm; (H7/s6) iii. Gear & Shaft: Critical Diameter is 20 mm (for the Right Gear) (H7/k6)
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CW5.docx Draw the Orthographic Projections (Top View, Front View, Side View) For the Shapes Shown Below, Using Scale (2:1) 30 II