Transcript Slide 1 - Mayfield City Schools

Fluids Review
Which of the following is a fluid
at room temperature?
helium
wood
iron
gold
ld
0%
go
n
0%
iro
oo
d
0%
w
liu
m
0%
he
1.
2.
3.
4.
Which of the following
statements is NOT correct?
1. A fluid flows.
2. A fluid has a definite
shape.
3. Molecules of a fluid
are free to move
past each other.
4. A fluid changes its
shape easily.
es
ng
ch
a
of
s
A
flu
id
ul
e
ol
ec
M
its
flu
id
a
de
fin
a
ha
s
id
flu
s.
..
...
ite
flo
w
id
flu
A
A
ar
...
s.
0% 0% 0% 0%
At 20.0° C, steel has a density of 7.80 g/
cm3. A 100. gram piece of steel would
occupy ____ cubic centimeters of space.
1. 0.078
2. 12.8
3. 128
4. 780
0
0%
78
8
0%
12
.8
0%
12
.0
7
8
0%
Two paper cups are hung by strings 10 cm
apart. If a person blows between the cups,
1. they move toward
each other.
2. they move away
from each other.
3. they do not move.
4. they move
upward.
up
w
e
m
ov
th
ey
do
ey
th
ar
d.
e.
m
ov
no
t
fr
om
...
aw
ay
m
ov
ey
th
th
ey
m
ov
e
e
to
w
ar
d
ea
..
0% 0% 0% 0%
In a large tank of liquid, the gauge pressure
at a given depth is a function of:
depth.
surface area.
liquid density.
Choices a and c
are both valid.
ar
c
de
C
ho
ic
e
s
a
liq
an
d
ui
d
ce
rf
a
su
e.
..
ity
.
ns
ar
ea
pt
h.
.
0% 0% 0% 0%
de
1.
2.
3.
4.
A force exists between two
regions of fluid if …
0%
is
is
Th
er
e
ap
lo
w
re
. ..
...
h
hi
g
is
Th
er
e
0%
p.
..
0%
Th
er
e
1. There is high
pressure in both
2. There is low
pressure in both
3. There is a
pressure
difference
An object that is sinking, must
have a buoyant force that is:
...
...
0%
Le
ss
th
a
n
th
e
w
Eq
u
al
t
o
th
e
ha
n
Gr
ea
te
rt
ha
n
Gr
ea
te
rt
0%
t..
.
0%
t..
.
1. Greater than the weight of
the object
2. Greater than the apparent
weight of the object
3. Equal to the weight of the
object
0%
4. Less than the weight of the
object
Because a buoyant force acts in
the opposite direction of gravity,
.
ge
d
i..
.
i..
ts
su
bm
er
ge
d
je
c
ob
ob
je
c
ts
su
bm
er
ge
d
i..
.
..
ob
je
c
ts
su
bm
er
ge
d
su
bm
er
4.
0% 0% 0% 0%
ts
3.
je
c
2.
objects submerged in water
have a net force smaller than
their weight.
objects submerged in water
have a net force larger than
their weight.
objects submerged in water
have a net force equal to their
weight.
objects submerged in water
appear to weigh more than
they do in air.
ob
1.
An ideal fluid is all of the
following except
Laminar flow
Viscous
Incompressible
A gas or a liquid
ra
liq
. ..
0%
ga
so
A
pr
es
s ib
le
0%
m
Vi
sc
ou
s
0%
In
co
in
ar
flo
w
0%
La
m
1.
2.
3.
4.
If the fluid speed increases,
what will happen to the
pressure?
1. Increases
2. Decreases
3. nothing
ng
0%
no
th
i
0%
De
cr
ea
se
s
In
cr
ea
se
s
0%
If a semi truck drives past you
and creates a fast flow of air,
your car will
0%
ng
.. .
fro
ay
aw
ov
e
M
alo
m
...
th
ar
d
to
w
M
ov
e
0%
...
0%
Co
nt
in
ue
1. Move toward the
truck
2. Move away from
the truck
3. Continue along the
same path
In hydraulic brakes, the area of the piston
connected to the brake pedal is ______ than the
area of the piston connected to the brake pads.
1. Less than
2. More than
3. The same as
Th
e
sa
m
e
n
M
or
e
th
a
th
a
Le
ss
0%
as
0%
n
0%
If blood flows from a smaller to
a larger artery in a closed
system, the velocity will
1. Increase
2. Decrease
3. Stay the same
0%
St
a
yt
he
sa
m
e
0%
De
cr
ea
se
In
cr
ea
se
0%
What does Archimedes'
principle state?
...
..
ac
oy
an
bu
bu
Th
e
e
Th
tf
or
ce
tf
or
ce
a.
...
oy
an
tf
or
ce
ac
...
ac
Th
e
bu
oy
an
tf
or
ce
oy
an
4.
0% 0% 0% 0%
bu
3.
e
2.
The buoyant force acting on an
object is equal to the weight of
the fluid displaced by the object.
The buoyant force acting on an
object is equal to the volume of
the fluid displaced by the object.
The buoyant force acting on an
object decreases if the volume of
the object increases.
The buoyant force acting on an
object decreases if the object is
placed in a denser liquid.
Th
1.
Which of the following is always
true?
fs
ub
m
...
M
as
so
tf
or
ce
of
e
um
0%
er
. ..
0%
Bu
oy
an
su
bm
...
Vo
l
Bu
oy
an
0%
...
0%
tf
or
ce
1. Buoyant force = Weight of
the object
2. Volume of submerged
object = Volume of
displaced fluid
3. Buoyant force is in the
same direction as the
weight of the object
4. Mass of submerged object
= Mass of displaced fluid
In a closed system, the flow rate
of a larger pipe is ________ the
flow rate smaller diameter pipe.
1. More than
2. Less than
3. The same as
0%
as
sa
m
e
Th
e
th
a
n
0%
Le
ss
M
or
e
th
a
n
0%
Which of the following is not
always true?
0%
0%
. ..
in
ob
je
ct
An
y
If
ob
je
ct
is
...
f..
.
0%
tf
or
ce
Bu
oy
an
Bu
oy
an
tf
or
ce
...
1. Buoyant force = Weight of
the displaced fluid
2. Buoyant force = Weight of
the object
3. If object is floating, the
apparent weight is 0.
4. Any object in a fluid has an
apparent weight less than 0%
its actual weight.
A municipal water supply is provided by a tall water tower.
Water from this tower flows to a building. How does the
water flow out of a faucet on the ground floor of a building
compare with the water flow out of an identical faucet on
the second floor of the building?
..
s.
..
of
ee
d
lo
w
s
Th
e
sp
rf
at
e
W
th
e
he
at
t
m
or
e
rf
at
e
W
w
at
e.
...
ra
p
...
ra
p
lo
w
s
m
or
e
lo
w
s
4.
rf
3.
0% 0% 0% 0%
at
e
2.
Water flows more rapidly
out of the ground-floor
faucet.
Water flows more rapidly
out of the second-floor
faucet.
Water flows at the same
speed out of both faucets.
The speed of the water
flow cannot be determined
unless the height of the
water tower is known.
W
1.
Pascal’s principle is the guiding
principle behind
m
ac
hi
ne
s
t.
..
fa
ct
th
a
Th
e
ha
t
ne
st
ac
hi
M
0%
t..
.
0%
...
0%
Al
l
1. Machines that use
hydraulic fluids
2. The fact that metal
boats can float
3. All machines that
increase
mechanical
advantage
Which of the following statements about
completely submerged objects resting on
the ocean bottom is correct?
f.
..
0%
to
d
Th
e
w
ei
gh
la
ce
di
sp
Th
e
bu
e
Th
0%
...
tf
o.
..
0%
oy
an
tf
o.
..
0%
oy
an
4.
bu
3.
e
2.
The buoyant force acting on
the object is equal to the
object’s weight.
The buoyant force is greater
than the weight of the object.
The displaced volume of fluid
is greater than the volume of
the object.
The weight of the displaced
fluid is the same as the
buoyant force.
Th
1.