• #### 1.  The buoyant force that acts on a 20,000-N ship is

• somewhat less than 20,000 N.
• 20,000 N.
• more than 20,000 N.
• dependent on whether it is in fresh water or salt water.
• #### 2.  A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area.

• hydraulic system
• archimedes system
• pressure system
• bernoulli effect

• Newton
• Gram
• Pascal
• Pound

• helium
• ice
• iron
• gold

• streamlined
• turbulent
• laminar
• viscous

• Substance
• Fluid
• Pressure
• Displacement
• #### 7.  Diagram shows the design of a dam. Why does the thickness of the dam increase with its depth?

• The design of this structure is stronger.
• Water pressure increases with depth.
• The cost of construction is lower.
• Water pressure acts uniformly in all directions.
• #### 8.  States that as the velocity of a fluid increases, the pressure decreases. This causes planes to fly .

• Archimedes' Principle
• Bernoulli's Principle
• Pascal's Principle
• #### 9.  Several cans of different sizes and shapes are all filled with the same liquid to the same depth. Then,

• The pressure on the bottom of each can is the same
• The weight of the liquid on the bottom of each can is the same
• The least pressure is at the bottom of the can with the largest bottom area
• the force of the liquid on the bottom of each can is the same

• 1.5 m/s
• 4.5 m/s
• 45 m/s
• 6 m/s
• #### 11.  If you were to smoosh down a piece of bread, what would happen to its mass?

• it would decrease
• it would increase
• it would stay the same
• #### 12.  Helium balloons rise on earth because

• helium is less dense than air
• helium is more dense than air
• helium is cooler than air
• helium is warmer than air

• 70 N
• 180 N
• 250 N
• 320 N
• #### 14.  This is what happens to an object when the buoyant force is stronger than the gravitational force.

• sinks
• floats
• I don't know...

• above
• below
• #### 16.  Which would have greater pressure, 2 meters below the surface in an infinite pool, or 2 meters below the surface of an Olympic pool?

• infinite pool
• olympic pool
• they would both be the same
• #### 17.  According to Bernoulli's theorem in a flowing liquid

• velocity is inversely proportional to pressure
• velocity is directly proportional to pressure
• velocity is directly proportional to volume
• #### 18.  When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.

• Pascal's Principle
• Newton's Principle
• Archimedes' Principle
• Bernoulli's Principle
• #### 19.  Bernoulli's principle states that as the velocity of a fluid ______, the pressure exerted by the fluid ______

• increases; increases
• decreases; decreases
• increases; decreases
• decreases; increases
• #### 20.  How do ships float when they are made of tons of metal?

• they have engines that hold them up
• the water they displace has a weight greater than that of the ship
• their density is higher than water
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