A large water tank, open at the top, has a small hole in the bottom. When the water level is 25 m above the bottom of the tank, the speed of the water leaking from the hole is: Select one: O a. 31 m/s O b. 22.1 m/s O c. cannot be calculated unless the area of the hole is given O d. 15.7 m/s O e. 11 m/s

A block of wood floats in fresh water with 0.45 volume V submerged. Find the density of the wood? Select one: O A. 0.55 g cm-3 -3 O B. 0.60 g cm¯ O C. 0.50 g cm-3 O D. 0.40 g cm¯ -3 O E. 0.45 g cm¯³

8. A piece of copper has a mass of 2.6 kg. a. What is the volume of this piece of copper?b. The copper is then totally submerged in water. What is the buoyant force acting on it? c. What is the piece of copper’s apparent weight in the water?

Assume that the average density of a arctic iceberg is 0.67 that of seawater. What fraction of an iceberg's volume is submerged?  A. 0.67。  B. 0.5。  C. 0.33。  D. 0.86。

When an object of mass 15.5 kg is submerged in water , a scale reads only 13.4 kg. Find the volume of the object knowing that the water density is 1 x 103 kg/m3, a) 1.1 x 10-3 m3 b) 2.1 x 10-3 m3 c) 3.1 x 10-3 m3 d) 4.1 x 10-3 m3 O 1. c O 2. None 3. a O4. b O 5. d here to search

6. A rock with a mass of 540 g in air is found to have an apparent mass of 300 g when submerged in water with a density of 997 kg/m³. (a) What mass of water is displaced? (b) What is the volume of the rock? (c) What is the average density of the rock?

SP5. A pipe with a circular cross section has a diameter of 9 cm. It narrows at one point to a diameter of 5.2 cm. The pipe is carrying a steady stream of water that completely fills the pipe and is moving with a speed of 1.6 m/s in the wider portion. a. What are the cross-sectional areas of the wide and nar- row portions of the pipe? (A = ar", and the radius is half the diameter.) b. What is the speed of the water in the narrow portion of the pipe? c. Is the pressure in the narrow portion of the pipe greater than, less than, or equal to the pressure in the wider portion? Explain.

Consider the sealed containers (same fluid and on the same ground level) below with heights given in a and b values.Provided that b = 2a, answer the following items.  Suppose the bottom pressure is evaluated, what container experiences the second highest pressure? A. Container AB. Container BC. Container CD. Container D

A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m?. The density of air is 1.3 kg/m. 12. What is the average density of the balloon? A) 0.2 kg/m3 B) 0.4 kg/m3 C) 0.8 kg/m D) 1.0 kg/m E) 1.2 kg/m3 13. Will the balloon rise, fall, or remain stationary, and why? A) The balloon will fall because its density is greater than that of air. B) The balloon will remain stationary because its density is less than that of air. c) The balloon will rise because the upward buoyant force is greater than its weight. D) The balloon will fall because the upward buoyant force is less than its weight. E) The balloon will fall because the downward buoyant force is greater than the upward buoyant force.

6. A solid aluminum bar weighs 89 N in air. a. What is its volume? b. If it is suspended from a rope and totally submerged in water, what is the tension in the rope?