The value of the gravitational acceleration g decreases with elevation from 9.807 m/s 2 at sea level to 9.767 m/s 2 at an altitude of 13,000 m, where large passenger planes cruise. Determine the percent reduction in the weight of an airplane cruising at 13,000 m relative to its weight at sea level.
The value of the gravitational acceleration g decreases with elevation from 9.807 m/s 2 at sea level to 9.767 m/s 2 at an altitude of 13,000 m, where large passenger planes cruise. Determine the percent reduction in the weight of an airplane cruising at 13,000 m relative to its weight at sea level.
The value of the gravitational acceleration g decreases with elevation from 9.807 m/s2 at sea level to 9.767 m/s2 at an altitude of 13,000 m, where large passenger planes cruise. Determine the percent reduction in the weight of an airplane cruising at 13,000 m relative to its weight at sea level.
Expert Solution & Answer
To determine
The reason why a bicyclist on a downhill road picks up speed even when he is not pedaling and also find whether this violates the principle of conservation of energy?
Explanation of Solution
In this case, there are two forms of energy involved; potential energy and kinetic energy. When the bicyclist is at the top of a hill, he has potential energy due to his mass. When bicyclist moves, the energy changes its form to kinetic energy due to his motion. Thus, the bicyclist picks speed when he moves downhill even when he is not pedaling.
There is a transformation in the forms of energy which states the principle of energy. Hence, there is no violation of the principle of conservation of energy.
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2) Use the method of MEMBERS to determine the true magnitude and
direction of the forces in members1 and 2 of the frame shown below
in Fig 3.2.
300lbs/ft
member-1
member-2
30°
Fig 3.2.
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5670 mm
The apartment in the ground floor of three floors building in Fig. in Baghdad city. The details of
walls, roof, windows and door are shown. The window is a double glazing and air space thickness
is 1.3cm Poorly Fitted-with Storm Sash with wood strip and storm window of 0.6 cm glass
thickness. The thickness of door is 2.5 cm. The door is Poor Installation. There are two peoples
in each room. The height of room is 280 cm. assume the indoor design conditions are 25°C DBT
and 50 RH, and moisture content of 8 gw/kga. The moisture content of outdoor is 10.5 gw/kga.
Calculate heat gain for living room :
الشقة في الطابق الأرضي من مبنى ثلاثة طوابق في مدينة بغداد يظهر في مخطط الشقة تفاصيل الجدران والسقف
والنوافذ والباب. النافذة عبارة عن زجاج مزدوج وسمك الفراغ الهوائي 1.3 سم ضعيف الاحكام مع ساتر حماية مع إطار
خشبي والنافذة بسماكة زجاج 0.6 سم سماكة الباب 2.5 سم. الباب هو تركيب ضعيف هناك شخصان في كل غرفة.
ارتفاع الغرفة 280 سم. افترض أن ظروف التصميم الداخلي هي DBT25 و R50 ، ومحتوى الرطوبة 8…
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