Balloons are often filled with helium gas because it weighs only about oneseventh of what air weighs under identical conditions. The buoyancy force, which can be expressed as Fb = rairgVballoon, will push the balloon upward. If the balloon has a diameter of 12 m and carries two people, 85 kg each, deter mine the acceleration of the balloon when it is first released. Assume the density of air is r = 1.16 kg/m3, and neglect the weight of the ropes and the cage.

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A: The block, attached to the spring scale, expands the spring, and thus by the force acting on the…

Q: (a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 27.8 m. Assume…

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Q: Crew members attempt to escape from a damaged submarine 71.7 m below the surface.What force must be…

A: The needed force will be 9.06*10^5 newton.

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A: Given data: The base area of tank is A. The length of tank is L. The density of liquid is ρ.

Q: Snorkeling by humans and elephants. When a person snorkels, the lungs are connected directly to the…

A: density of water= 997 kg/m3 g= 9.8 m/s2

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Q: If the balloon is perfectly spherical, calculate it's diameter provided the following values: M =…

A: the bouancy on balloon will be equal to the weight of climber and balloon

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Q: The density of gasoline and mercury are 789 kg/m3 and 13 600 kg/m3 respectively. Normal atmospheric…

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Q: 1. (a) Calculate the absolute pressure at the bottom of a fresh water lake at a depth of 27.5 m.…

A:

Q: 12. In emergency, the doctors want that the Volume flow rate of blood transfusion for 10 m/s. The…

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Q: Two capillary tubes with an internal diameter of 1.6 mm and 0.96 mm were inserted into a liquid of…

A: Given: Diameter of first tube R1 = 1.6 mm. Diameter of first tube R2 = 0.96 mm. Density of the…

Q: A U-tube open at both ends is partially filled with water (Figure (a)). Oil (? = 750 kg/m3) is then…

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Q: A large spherical air balloon is filled with helium. If the balloon is to support (meaning produce a…

A: Ans. (c) 3.8 m

Q: A submarine is stranded on the bottom of the ocean with its hatch 25 m below the surface. In this…

A: Pressure P=FA So , Force F =PA Given : Density of sea water ρ=1.03××103 kg/m3 Depth h=25 m Diameter…

Q: The aorta carries blood away from the heart at a speed of about 41 cm/s and has a radius of…

A:

Q: (a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 32.6 m. Assume…

A: Depth = 32.6 m Density = 1.00 ✕ 103 kg/m3 Atmospheric pressure = 101.3 kPa.