Name: __________________________ Date: _____________



1.
All fluids are:
A.
gases
B.
liquids
C.
gases or liquids
D.
non-metallic
E.
transparent


2.
The pressure exerted on the ground by a man is greatest when:
A.
he stands with both feet flat on the ground
B.
he stands flat on one foot
C.
he stands on the toes of one foot
D.
he lies down on the ground
E.
all of the above yield the same pressure


3.
The vessels shown below all contain water to the same height. Rank them according to the pressure exerted by the water on the vessel bottoms, least to greatest.
A.
1, 2, 3, 4
B.
3, 4, 2, 1
C.
4, 3, 2, 1
D.
2, 3, 4, 1
E.
All pressures are the same


4.
The diagram shows a U-tube having cross-sectional area A and partially filled with oil of density ρ. A solid cylinder, which fits the tube tightly but can slide without friction, is placed in the right arm. The system reaches equilibrium. The weight of the cylinder is:
A.
ALρg
B.
L3ρg
C.
Aρ(L + h)g
D.
Aρ(L – h)g
E.
none of these


5.
The density of water is 1.0 g/cm3. The density of the oil in the left column of the U-tube shown below is:
A.
0.20 g/cm3
B.
0.80 g/cm3
C.
1.0 g/cm3
D.
1.3 g/cm3
E.
5.0 g/cm3


6.
"An object completely submerged in a fluid displaces its own volume of fluid." This is:
A.
Pascal's paradox
B.
Archimedes' principle
C.
Pascal's principle
D.
true, but none of the above
E.
false


7.
Two identical blocks of ice float in water as shown. Then:
A.
block A displaces a greater volume of water since the pressure acts on a smaller bottom area
B.
block B displaces a greater volume of water since the pressure is less on its bottom
C.
the two blocks displace equal volumes of water since they have the same weight
D.
block A displaces a greater volume of water since its submerged end is lower in the water
E.
Block B displaces a greater volume of water since its submerged end has a greater area


8.
An object hangs from a spring balance. The balance indicates 30 N in air, 20 N when the object is submerged in water.What does the balance indicate when the object is submerged in liquid with a density that is half of water?:
A.
20 N
B.
25 N
C.
30 N
D.
35 N
E.
40 N


9.
One piston in a hydraulic lift has an area that is twice the area of the other. When the pressure at the smaller piston is increased by Δp the pressure at the larger piston:
A.
increases by 2Δp
B.
increases by Δp/2
C.
increases by Δp
D.
increases by 4Δp
E.
does not change


10.
A hydraulic press has one piston of diameter 2.0 cm and the other piston of diameter 8.0 cm. What force must be applied to the smaller piston to obtain a force of 1600 N at the larger piston:
A.
6.25 N
B.
25 N
C.
100 N
D.
400 N
E.
1600 N


11.
Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0 m/s The difference in pressure between the two ends is 4.5 ×103 Pa. The speed of the water at the narrow end is::
A.
2.6 m/s
B.
3.4 m/s
C.
4.0 m/s
D.
4.5 m/s
E.
5.0 m/s


12.
Water is pumped into one end of a long pipe at the rate of 40 L/min. It emerges at the other end at 24 L/min. A possible reason for this decrease in flow is:
A.
the water is being pumped uphill
B.
the water is being pumped downhill
C.
the diameter of the pipe is not the same at the two ends
D.
friction in the pipe
E.
a leak in the pipe


13.
A non-viscous incompressible fluid is pumped steadily into the narrow end of a long tapered pipe and emerges from the wide end. The pressure at the input is greater than at the output. A possible explanation is:
A.
the fluid speed increases from input to output
B.
the fluid speed is the same at the two ends
C.
the fluid is flowing uphill
D.
the fluid is flowing downhill
E.
the fluid is flowing horizontally


14.
Water flows from a 6.0-cm diameter pipe into an 8.0-cm diameter pipe. The speed in the 6.0-cm pipe is 5.0 m/s. The speed in the 8-cm pipe is:
A.
2.8 m/s
B.
3.7 m/s
C.
6.6 m/s
D.
8.8 m/s
E.
9.9 m/s


15.
A person blows across the top of one arm of a U-tube partially filled with water. The water in that arm:
A.
rises slightly
B.
drops slightly
C.
remains at the same height
D.
rises if the blowing is soft but drops if it is hard
E.
rises if the blowing is hard but drops if it is soft


16.
If two objects are in thermal equilibrium with each other
A.
they cannot be moving
B.
they cannot be undergoing an elastic collision
C.
they cannot have different pressures
D.
they cannot be at different temperatures
E.
they cannot be falling in the Earth's gravitational field


17.
Suppose object C is in thermal equilibrium with object A and with object B. The zeroth law of thermodynamics states:
A.
that C will always be in thermal equilibrium with both A and B
B.
that C must transfer energy to both A and B
C.
that A is in thermal equilibrium with B
D.
that A cannot be in thermal equilibrium with B
E.
nothing about the relationship between A and B


18.
The air temperature on a summer day might be about:
A.
0°C
B.
10°C
C.
25°C
D.
80°C
E.
125°C


19.
The coefficient of expansion of a certain steel is 0.000012 per C°. The coefficient of volume expansion, in (C°)–1, is:
A.
(0.000012)3
B.
(4π/3)(0.000012)3
C.
3 × 0.000012
D.
0.000012
E.
depends on the shape of the volume to which it will be applied


20.
Metal pipes, used to carry water, sometimes burst in the winter because:
A.
metal contracts more than water
B.
outside of the pipe contracts more than the inside
C.
metal becomes brittle when cold
D.
ice expands when it melts
E.
water expands when it freezes


21.
On a very cold day, a child puts his tongue against a fence post. It is much more likely that his tongue will stick to a steel post than to a wooden post. This is because:
A.
steel has a higher specific heat
B.
steel is a better radiator of heat
C.
steel has a higher specific gravity
D.
steel is a better heat conductor
E.
steel is a highly magnetic material


22.
Fifty grams of ice at 0°C is placed in a thermos bottle containing one hundred grams of water at 6°C. How many grams of ice will melt? The heat of fusion of water is 333 kJ/kg and the specific heat is 4190 J/kg ⋅ K.
A.
7.5
B.
2.0
C.
8.3
D.
17
E.
50


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