Physics Chapter 19
What is the mass of a liter of water
1 kilogram
Any object with a volume of _________________ will experience a buoyant force of _____________ when fully submerged in water.
1 liter / 10 N
What does an objects density have to be for it to sink in water?
1.5 g/cm cubed
When iron is submerged, a solid 1-ton block of iron will display only _____________ ton of water.
1/8 (the buoyant force will be far from enough to keep it from sinking)
How much does a liter of water weigh
10 N
How many cubic centimeters does a liter of water occupy
1000 cubic centimeters
How much more dense is mercury from water
13.6
If a 1-liter bottle is filled with mercury what is its mass and weight?
13.6 kg mass & 136 N weight
Suppose a stone weighs 10 N in the air, but in water it weighs only 8N. What is the buoyant force acting on the stone?
2 N
What is a pressure if a force of 50N is exerted over an area of 10cm squared?
5 N/cm squared
What takes the shape of its container
A liquid
When was the Archimedes principle discovered and by who
Ancient times (third century B.C.) by the Greek philosopher Archimedes
Describes the relationship between buoyancy and displaced liquid
Archimedes' principle
Describes the relationship between buoyancy and displaced liquid. This principle is true for liquids and gases, which are both fluids
Archimedes' principle
States that the buoyant force on an immersed object is equal to the weight of the fluid it displaces
Archimedes' principle
Pressure is force divided by________________.
Area
What is an example of a hydraulic device?
Brake system in a car
Is the apparent loss of weight of objects when submerged in a liquid
Buoyancy
The force of a fluid that pushes an object up
Buoyancy
Is the net upward force exerted by a fluid on a submerged or immersed object
Buoyant force
The waters surface in each of the ______________ vases is at the same level. The pressure at equal depths are the same
Connected
Water has slightly different ________________at different temperatures.
Densities
How much a liquid weighs, and how much pressure it exerts, depends on ______________.
Density
Mass divided by volume
Density
The degree of compactness of a substance
Density
What does pressure in a liquid depend on?
Depth of the measuring point and mass of the liquid
What is the following procedure for: submerge the object in water in a measuring cup. Note the apparent increase in volume of the water. (Side note-The increase is equal to the volume of the submerged object)
Determine the volume of an irregularly shaped object
For example, at the bottom of all four vases the pressures would are ______________.
Equal
When the weight is ____________ to the buoyant force, the submerged object will remain at any level, like a fish
Equal
Does a safety jacket sink or float?
Float
Does a ship sink or float?
Float
Strength or energy as an attribute of physical action or movement
Force
A glass of water that is full to the top would have more pressure at the bottom than a ____________
Glass of water that is half full
If a submarines beneath the surface displaces a weight of water less than its own weight, it will________________.
Go down
What does the pressure of a liquid depend on
Gravity, the density, depth of liquid
A device using a hydronic cylinder to generate a compressive force
Hydraulic press
Hydraulic devices work on the principle that pressure in a fluid is exerted _______________________________________.
In all directions
What would cause an increase in pressure?
Increasing the force
What is eight times as dense as water?
Iron
Would a fish sink or float?
It would do neither sink or float because it has the same density as water
Are practically incompressible, at a given temperature, so the density is normally the same at all depths
Liquids
What is Archimedes' principle true for
Liquids and gasses (which are both fluids)
a coherent, typically large body of matter with no definite shape.
Mass
Neither the volume nor even the total weight of liquid ____________.
Matters
For the same depth, a denser liquid exerts _____________ pressure
More
Does the pressure of a liquid at rest depend on the shape of the container or the size of its bottom surface
No
The pressure of a liquid does _________ depend on the amount of liquid
Not
In the liquid phase, molecules can flow freely from position to position by sliding over_________________.
One another
Describes how change in a pressure are transmitted in a fluid
Pascal's principle
The _______________ of mercury on the bottom is 13.6 times the pressure of water.
Pressure
The continuous physical force exerted on or against an object by something in contact with it
Pressure
When a dam holds back water that is twice as deep it must withstand greater average water _____________, regardless of the total _______________ of water.
Pressure / Volume
What is the pressure created by a liquid
Pressure due to liquid = density x g x depth
The pressure of a liquid at rest depends on gravity and the density and the depth of the liquid
Pressure in liquid
If a submarine beneath the surface displaces a weight of water exactly its weight, it will ____________________.
Remain at constant depth
A boat floats in a tub of water. An iron block is in the boat. If the block is thrown overboard, what will the boat do?
Rise
If a submarine beneath the surface displaces a weight of water greater than its own weight, it will ____________.
Rise
The pressure of a liquid is the same at any given depth below the surface, regardless of the ______________ of the container
Shape
Does a submarine sink or float?
Sink
Does a fish sink or float?
Sink or float
1. An object more dense than the fluid in which it is immersed sinks. 2. An object less dense than the fluid in which it is immersed floats. 3. An object with density equal to the density of the fluid in which it is immersed neither sinks or floats
Sinking and floating rules
Does a crocodile sink or float?
Sinks or floats
Is water pressure deeper in a large but shallow lake, or a small but deep lake
Small but deep lake
If the volume of an object were to double while is mass remained the same, what would its density do?
Split in half
Which is easier; to lift a boulder submerged on the bottom of a riverbed or to lift it above the water's surface
Submerged on the bottom
What does "Pascal's vases" illustrate?
That water pressure depends on depth and not on volume
Liquids transmit pressure undiminished One piston is larger than the other piston Liquids transmit pressure in all directions
Why a hydraulic press works
Which object would sink and which object would float , wood and a rock?
Wood would float & rock would sink
What will happen when the submerged objects weight is less than the buoyant force
The object will rise to the surface and float
What will the happen if the weight of a submerged object is greater than the buoyant force
The object will sink
Where is the pressure greater, one meter beneath the surface of Lake Michigan or one meter beneath the surface of a swimming pool?
The pressure is approximately the same in both places
Why does an iron ship not sink?
The ship displaces more water that it would if it were in a solid block
The upward forces against the bottom of a submerged object are greater than the downward forces against the top. What kind of force is there
There is a net upward force, the buoyant force
The amount of space that a substance or object occupies or that is enclosed within a container, especially when great
Volume
When an object is submerged, it displaces a ____________ of water equal to the volume of the object itself
Volume
For the same volume of liquid, the weight of mercury is 13.6 times the weight of _______________.
Water
The heaviness of a person or thing
Weight
When would a crocodile be more dense?
When it eats stones
At what point would a canoe float lower in the water?
When people are in it
