1. Which weighs more? A. A large bathtub filled to the brim with water B. A larg

Question

1. Which weighs more? A. A large bathtub filled to the brim with water B. A large bathtub filled to the brim with water with a battle-ship floating in it. C. They will weigh the same. Water flows through a 4.0 cm radius pipe at 5 cm/s. The pipe then narrows downstream and has a radius of 3.0 cm. What is the velocity of the water through the smaller pipe? A) 20cm/s B) 10cm/s C) 5cm/s D) 8.9 cm/s 2 pherical weather bailoon is filled with hydrogen until its diameter is 10.00 m. Its total mass including the instruments it carries and the hydrogen is 25.0 kg. (The volume a sphere is given by v=arr where r is the radius) is given by rte where ris the radus (a) Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m. (b) What is the net force acting on the balloon and its instruments after the balloon is released from the ground? (c) As the balloon rises, its radius will increase, decrease or stay the same? Explain your answer.

Explanation / Answer

1. as battle ship is floating that means it will remove water of same mass.

hence both will have same weight.

ANs(C)

2. Volume flow velocity of water will remain same.

A1 v1 = A2 v2

(pi x 4^2 cm^2 ) x 5 cm/s = (pi x 3^2 cm^2) v

v = (5 x 4^2) / (3^2) cm/s = 8.89 cm/s

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.