Transcript Ch15 - Dripping Springs Independent School District

Fluids
Questions
A piece of glass is broken into two pieces of different
size. Rank order, from largest to smallest, the mass
densities of pieces 1, 2, and 3.
A.
B.
C.
D.
E.
Water is slowly poured into the container until the water
level has risen into tubes A, B, and C. The water doesn’t
overflow from any of the tubes. How do the water depths in
the three columns compare to each other?
A. dA > dB > dC
B. dA = dC > dB
C. dA < dB < dC
D. dA = dC < dB
E. dA = dB = dC
Rank in order, from largest to
smallest, the magnitudes of the
forces
required
to balance the masses. The
masses are in kilograms.
A.
B.
C.
D.
E.
F2 > F1 > F3
F2 > F1 = F3
F3 > F2 > F1
F3 > F1 > F2
F1 = F2 = F3
An ice cube is floating in a glass of water that is filled
entirely to the brim. When the ice cube melts, the water
level will
A. stay the same, right at the brim.
B. rise, causing the water to spill.
C. fall.
The figure shows volume flow rates (in cm3/s) for all but
one tube. What is the volume flow rate through the
unmarked tube? Is the flow direction in or out?
A.
B.
C.
D.
E.
1 cm3/s, out
1 cm3/s, in
10 cm3/s, out
10 cm3/s, in
It depends on the
relative size of the
tubes.
Salt water is more dense than fresh water. A ship floats in
both fresh water and salt water. Compared to the fresh
water, the volume salt water displaced is
A.
B.
C.
D.
More
Less
The same.
Cannot be determined from
the information given.
Rank in order, from highest to lowest, the liquid heights h1
to h4 in tubes 1 to 4. The air flow is from left to right.
A.
B.
C.
D.
E.
h1 > h3 > h4 > h2
h1 > h2 = h3 = h4
h2 = h3 = h4 > h1
h2 > h4 > h3 > h1
h3 > h4 > h2 > h1
What is the SI unit of pressure?
A. Pascal
B. Atmosphere
C. Bernoulli
D. Young
E. L.S.I.
Pascal’s principle says that changes in pressure at any point in
an enclosed fluid
A.
B.
C.
D.
E.
are transmitted to all points in the fluid.
quickly diminish from point to point in the fluid.
remain only at the point.
are transmitted only to points below it.
are transmitted only to points close to it.
Is gauge pressure larger, smaller, or the same as absolute
“true” pressure?
A. larger
B. smaller
C. same as
The buoyant force on an object submerged in a liquid
depends on
A. the object’s mass.
B. the mass of the liquid.
C. the object’s volume.
D. all of a, b, and c.
Archimedes’ principle says that an object is buoyed up by a
force that is equal to
A.
B.
C.
D.
E.
the weight of the fluid displaced
the volume of the fluid displaced.
the mass of the fluid displaced.
the mass of the object.
None of the above.
A hydraulic press works because
A.
B.
C.
D.
E.
one piston is larger than the other piston.
pascal’s principle is operating.
liquids trans.mit pressure undiminished.
liquids transmit pressure in all directions.
….all of the above
What is the difference between the pressures inside and
outside a tire called?
A.
B.
C.
D.
absolute pressure
atmospheric pressure
gauge pressure
N/m2
You are originally 1.0 m beneath the surface of a pool. If
you dive to 2.0 m beneath the surface, what happens to
the absolute pressure on you?
A.
B.
C.
D.
It quadruples.
It more than doubles.
It doubles.
It less that doubles.
50 cm3 of wood is floating on water, and 50 cm3 of iron is
totally submerged. Which has the greater buoyant force
on it?
A.
B.
C.
D.
The wood.
The iron.
Both have the same buoyant force.
Cannot be determined without knowing
their densities.