Describe the forces that enable the submarine to descend or ascend in the seawater. When the submarine holds at the constant depth of 3,500m, calculate the buoyant force on the submarine. weight of seawater in the ballast tank. seawater pressure. When seawater flows into the bottom opening at 10 m/s, calculate the velocity of the seawater level (8m above the bottom of the submarine) inside the ballast tank (v on diagram). Calculate the net force on the submarine circular hatch door (10m above the bottom of the submarine) with a radius of 0.5m. The air pressure inside the submarine below the hatch door is 150 101.3 kPa. Calculate the change in heat energy of the submarine’s outer haul, when it descends from the surface to a depth of 3,500m (with an average temperature of 20°C). Calculate the power of the submarine’s electrical heater needed, to maintain the interior of outer hull at 30°C. The exterior of outer hull is 10°C. (Assume heat of the submarine is only lost across the outer hull) Suggest aerospace applications of ballast.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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  1. Describe the forces that enable the submarine to descend or ascend in 

the seawater. 

 

  1. When the submarine holds at the constant depth of 3,500m, calculate the 
    1. buoyant force on the submarine.
    2. weight of seawater in the ballast tank.
    3. seawater pressure.

 

  1. When seawater flows into the bottom opening at 10 m/s, 

calculate the velocity of the seawater level (8m above the bottom of 

the submarine) inside the ballast tank (v on diagram).

 

  1. Calculate the net force on the submarine circular hatch door 

(10m above the bottom of the submarine) with a radius of 0.5m.

 The air pressure inside the submarine below the hatch door is

150 101.3 kPa.

 

  1. Calculate the change in heat energy of the submarine’s outer haul, 

when it descends from the surface to a depth of 3,500m

 (with an average temperature of 20°C).

  1. Calculate the power of the submarine’s electrical heater needed, 

to maintain the interior of outer hull at 30°C. 

The exterior of outer hull is 10°C. (Assume heat of the submarine is

 only lost across the outer hull)

 

  1. Suggest aerospace applications of ballast.
Air
Tank
Opening
Vent
Outer hull
Inner hull
Ballast tank
Transcribed Image Text:Air Tank Opening Vent Outer hull Inner hull Ballast tank
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