12. Your friend bought a 0.1 Kg golden ring at the open market. He is not totally sure about the material the ring is made of. So, you lower the ring into a container of water and measure the volume of displaced water. What must be the volume of displaced water if the ring is made of pure gold?

28. A 6.00 [kg] aluminum metal is suspended in a rope and partially immersed in water (Pwater = 1000 [kg/m³]). If the tension in the rope is 4.55 [N], what volume of aluminum was immersed? -3 A. 5.54 x 10-³ [m³] C. 5.54 [m³] B. 6.46 × 10−³ [m³] D. 6.46 [m³]

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。

9. A new water fountain has been installed outside of city hall. It is powered via a water tower that has its water level at a height of 14 m. Before the fountain is ceremonially turned on the pipe leading to the central fountain is closed. Assume that the water tower is wide enough that the level of the water does not drop significantly when the fountain is in use and that the tower is open to the air. a. What is the pressure in the pipe at the base of the fountain before it is opened?b. After the fountain is opened what is the speed of the water as it leaves the central pipe?c. How high will the water from the water fountain reach before falling back to the ground?

I Review I Constants I Periodic Ta Water flowing through a 2.5-cm-diameter pipe can fill a 200 L bathtub in 3.3 min . ▼ Part A What is the speed of the water in the pipe? Express your answer in meters per second. ? V = m/s Submit Request Answer

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?

6. A 100 cc block of Styrofoam (density 100 kg/m³) is held by a massless string, attaching the bottom of the block to the bottom of the vat, in a vat of water (density 1 gm/cc) as shown in the diagram. А. I Sketch and label the forces (with a brief description) on the free body diagram for the Styrofoam block? В. What is the tension in the string?

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?

Bird bones have air pockets in them to reduce their weight—this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 45.0 g and its apparent mass when submerged is 3.60 g (the bone is water light) a. What mass of water is displaced? b. What is the volume of the bone? c. What is its average density?