As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it?
It increases.
It remains constant.
It decreases.
It may increase or decrease, depending on the shape of the rock.
For a floating body in a liquid, the buoyant force is acting _____________ through the centre of gravity.
vertically upwards
vertically downwards
horizontally
planar
An object is placed in a fluid. The buoyant force on the object is proportional to
The density of the object.
Density of the fluid
The volume of the object.
Both A and B
A liquid has a specific gravity of 0.357. What is its density?
357 kg/m3
643 kg/m3
1000 kg/m3
3570 kg/m3
The density of water at _________ is 1g/cm3
-4oC
0oC
Room temperature
4oC
A boat with a density of 0.75 g/cc is floating in water. What percentage of the boat is floating above the surface of the water?
25%
75%
50%
None; the boat will actually sink.
Oil has a smaller density than water. Therefore, an object that will float in oil will
float in water, with more of the object submerged.
float in water, with the same amount of the object submerged.
float in water, with less of the object submerged.
no float in water.
A wooden boat with a density of 0.48 g/cc is floating in a vat of oil whose density is 0.80 g/cc. What percentage of the boat is floating above the surface of the oil?
42 %
52 %
60 %
40 %
A bottle has a mass of 35.00 gm when empty and 98.44 g when filled with water. When filled with another liquid, the mass is 88.78 g. What is the specific gravity of the fluid?
0.90
0.81
0.85
1.18
What is the minimum mass needed for a spherical object with a 2 m radius to sink in an ocean whose water has a density of 1.1 × 10 kg/m3.
3.7 × 104kg
2.7 ×103 kg
7.4 ×103 kg
1.8 ×104kg.
