Unit: Fluids
I. What is Pressure?
II. Pressure and Depth
III. Archimedes’ Principle
IV. Bernoulli’s Equation
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Fluids Unit: Pressure, Depth, and Buoyancy, Exams of Physics
Various concepts related to fluids, including pressure, depth, archimedes' principle, bernoulli's equation, and buoyancy. The reader is presented with a series of questions to test their understanding of these topics. Questions cover topics such as the easiest place to drink with a straw, the behavior of logs and boats in water, and the effect of adding weights or oil to objects. Ideal for university students studying physics or engineering.
Typology: Exams
2012/2013
1 / 18
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Unit: Fluids
I.^
What is Pressure? II.
Pressure and Depth III. Archimedes’ PrincipleIV. Bernoulli’s Equation
Your ears are sensitive to pressure. A 12ft tall tube, barely wide enough to stand in, is
filled with water. Would you rather:a) go to the bottom of the tube?b) go to the bottom of a 12ft pool?c) Either one. It does not matter.
A scuba diver is observing the lake below. Rate the pressure the diver experiences atthe points below (from least to greatest).A
C^
D
B
What is the longest length straw from which you can “suck” water from a glass on the
surface of the earth?
A glass of water contains a large ice cube. What will happen to the level of the liquidwater when the ice melts?a) It will go up.b) It will go down.c) It will remain at the same level.
A log floats in a lake such that one half of the log is submerged. If the log is heldbeneath the water, what will be its acceleration when released?
An aluminum boat sits in the lake. What happens to the boat when it is filled withStyrofoam?a) It sinks further into the water.b) It rises higher in the water.c) It remains at the same level.
An aluminum boat sits in the lake. What happens to the boat when Styrofoam is tiedunderneath the boat?a) It sinks further into the water.b) It rises higher in the water.c) It remains at the same level.
A boulder falls off a cliff into the lake. The boulder is five times the density of water.Once it is fully submerged, will it accelerate? If so, what will be its acceleration(magnitude and direction)?
A block of wood is floating in a glass of water. What will happen to the block (withrespect to the glass) when oil is poured into the glass?a) It will move up.b) It will move down.c) It will remain at the same level.
You notice that a certain piece of material floats in water such that one half of thematerial is submerged. You then remove the material from the water and place it in acontainer of oil. Now three quarters of the material are submerged. What is thedensity of the oil?
In the movie Pirate of the Caribbean, Jack and Will carry a boat upside-down (filledwith air) under the water. Is this possible?