why does the highlighted parts become 0?

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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why does the highlighted parts become 0?

Section |
(1)
D₂ =
200 mm
D₁ = 400 mm
135°
Section (2)
1 + [[| Bpd# = __ fffŸ² (pd¥^ ) + ſſ V (pV · dÃ)
ôt c
CV
CS
SS TdA-
CS
Water flows through a 135° reducing bend. The
flow rate is 0.4 m³/s and pressures at sections 1
and 2 are 150 kPa and 90 kPa respectively. The
diameter of the pipe is 400 mm at section 1 and
200 mm at section 2. Determine the total force
on the anchor bolts. Neglect friction and
gravitational forces.
Transcribed Image Text:Section | (1) D₂ = 200 mm D₁ = 400 mm 135° Section (2) 1 + [[| Bpd# = __ fffŸ² (pd¥^ ) + ſſ V (pV · dÃ) ôt c CV CS SS TdA- CS Water flows through a 135° reducing bend. The flow rate is 0.4 m³/s and pressures at sections 1 and 2 are 150 kPa and 90 kPa respectively. The diameter of the pipe is 400 mm at section 1 and 200 mm at section 2. Determine the total force on the anchor bolts. Neglect friction and gravitational forces.
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