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What is the pressure at a depth of 0.50 m in water?
What is the pressure at a depth of 0.50 m in water?
Pressure in a liquid increases with depth.
Pressure in a liquid increases with depth.
True
What is the formula to calculate the pressure at a certain depth in a liquid?
What is the formula to calculate the pressure at a certain depth in a liquid?
P = hρg
The density of water is ______ kg m-3.
The density of water is ______ kg m-3.
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Match the liquid to its density (in kg m-3):
Match the liquid to its density (in kg m-3):
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Which principle states that an object submerged in a fluid experiences a buoyant force equal to the weight of the fluid it displaces?
Which principle states that an object submerged in a fluid experiences a buoyant force equal to the weight of the fluid it displaces?
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What happens to the pressure exerted by a liquid as the depth increases?
What happens to the pressure exerted by a liquid as the depth increases?
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The weight of the liquid above a surface area is not a factor in determining pressure.
The weight of the liquid above a surface area is not a factor in determining pressure.
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What is the formula used to calculate work done?
What is the formula used to calculate work done?
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Kinetic energy can be expressed as W = 1/2 mv^2.
Kinetic energy can be expressed as W = 1/2 mv^2.
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What is the weight of an object with a volume V and density ρ?
What is the weight of an object with a volume V and density ρ?
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An object that is completely submerged in a fluid experiences a buoyant force equal to the weight of the _____ displaced.
An object that is completely submerged in a fluid experiences a buoyant force equal to the weight of the _____ displaced.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Which of the following statements about buoyancy is correct?
Which of the following statements about buoyancy is correct?
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An object can have both kinetic and potential energy at the same time.
An object can have both kinetic and potential energy at the same time.
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The unit of work is measured in _____ (abbreviation).
The unit of work is measured in _____ (abbreviation).
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What is the formula that represents the buoyant force acting on an object submerged in a fluid?
What is the formula that represents the buoyant force acting on an object submerged in a fluid?
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An object will float if its weight is greater than the weight of the water displaced.
An object will float if its weight is greater than the weight of the water displaced.
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What principle explains why an object submerged in water appears to weigh less?
What principle explains why an object submerged in water appears to weigh less?
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The _____ force acting on a submerged object is equal to the weight of the liquid it displaces.
The _____ force acting on a submerged object is equal to the weight of the liquid it displaces.
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Match the following concepts with their corresponding descriptions:
Match the following concepts with their corresponding descriptions:
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What will happen to an object if its weight is exactly equal to the weight of the water it displaces?
What will happen to an object if its weight is exactly equal to the weight of the water it displaces?
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Submarines can navigate underwater by adjusting their weight to equal the weight of the water they displace.
Submarines can navigate underwater by adjusting their weight to equal the weight of the water they displace.
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If the density of wood is 0.5 × 10^3 kg/m³ and the density of water is 1.0 × 10^3 kg/m³, what percentage of the wood will be submerged when floating?
If the density of wood is 0.5 × 10^3 kg/m³ and the density of water is 1.0 × 10^3 kg/m³, what percentage of the wood will be submerged when floating?
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Study Notes
Pressure in Liquids
- Pressure in a liquid increases with depth.
- The pressure at a depth of 0.50 m in water can be calculated using the formula: Pressure = density × gravity × depth.
- The density of water is 1000 kg m-3.
Density of Liquids
- Density is a measure of mass per unit volume.
- Different liquids have different densities.
Archimedes' Principle
- Archimedes' Principle states that an object submerged in a fluid experiences a buoyant force equal to the weight of the fluid it displaces.
- This principle explains why objects float or sink.
Pressure and Depth
- The pressure exerted by a liquid increases as the depth increases.
- This is because the weight of the liquid above a surface area contributes to the pressure.
Work, Energy and Power
- Work is done when a force causes an object to move a certain distance.
- The formula used to calculate work done is: Work = Force × Distance.
- Kinetic energy is the energy of motion.
- Kinetic energy can be expressed as W = 1/2 mv^2, where m is the mass and v is the velocity.
- Potential energy is the energy of position.
Buoyant Force
- The buoyant force is an upward force exerted by a fluid on an object submerged in it.
- The buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced.
- An object will float if its weight is less than the weight of the water it displaces.
- An object will sink if its weight is greater than the weight of the water it displaces.
- An object will float if its weight is exactly equal to the weight of the water it displaces.
- The buoyant force explains why an object submerged in water appears to weigh less.
Submarines and Buoyancy
- Submarines can navigate underwater by adjusting their weight to equal the weight of the water they displace.
- When a submarine wants to dive, it takes in water to increase its weight and sink.
- When a submarine wants to surface, it expels water to decrease its weight and rise.
Density and Submergence
- The percentage of an object submerged in a fluid is determined by the ratio of its density to the density of the fluid.
- If the density of wood is 0.5 × 10^3 kg/m³ and the density of water is 1.0 × 10^3 kg/m³, then 50% of the wood will be submerged when floating.
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