The SI units of mass are: 1.Kilograms 2.Pounds 3.g/cm 3 4.Grams.
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Transcript of The SI units of mass are: 1.Kilograms 2.Pounds 3.g/cm 3 4.Grams.
The pull of earth’s gravity on an object equals_____.
1. Mass in kilograms times 9.8 m/s2
2. Mass times the acceleration of the object
3. 9.8 N
4. Density times volume
Which of the following is NOT measured in Joules?
1. Work
2. Kinetic Energy
3. Potential Energy
4. Heat
5. Power
A TV set is pushed a distance of 2 m with a force of 20 N acting in the direction of motion. How
much work did the force do on the TV?
1. 2 J
2. 10 J
3. 20 J
4. 40 J
5. 80 J
Which requires more work: lifting a 50 kg object 2 meters, or lifting a
25 kg object 4 meters?1. The 50 kg object
2. The 25 kg object
3. Both require the same work
A 2 kg mass has 40 J of potential energy relative to the ground. How far
is it above the ground?1. 1 meter
2. 2 meters
3. 3 meters
4. 4 meters
5. None of these
The kinetic energy of a moving object increases from 5.0 J to 12 J. How
much work was done on the object?
1. None
2. 17 J
3. 60 J
4. 7 J
5. 2.4 J
If the speed of an object doubles its kinetic energy:
1. Is cut in half
2. Quadruples
3. Doubles
4. Does not change
A 50 N force acts north on an object that moves 4.0 meters east. The work done by
the force is:1. 200 J
2. 12. 5 J
3. 0.0 J
4. 54 J
A 50 kg skier is moving at 8.0 m/s when they are still 12 meter above the bottom of the
hill. Which of the following is true?1. KE = 1.6 kJ
2. PE = 6.0 kJ
3. Etotal=7.6 kJ
4. All of the above
A 50 kg skier is moving at 8.0 m/s when they are still 12 meter above the bottom of the hill. If friction
and air resistance can be ignored, their kinetic energy at the bottom will be:
1. 1.6 kJ
2. 6.0 kJ
3. 7.6 kJ
4. None of the above
A diver who weighs 500 N steps of a diving board that is 10 meters above the water. The diver hits
the water with a kinetic energy of:
1. 10 J
2. 500 J
3. 510 J
4. 5 kJ
5. > 5 kJ
Which has greater kinetic energy, a car traveling at 30 km/hr or one half as massive traveling at 60
km/hr?
1. The 30 km/hr car
2. The 60 km/hr car
3. Both have the same kinetic energy
To do 35 J of work in 5.0 seconds requires a power of:
1. 7.0 Watts
2. 30 Watts
3. 175 Watts
4. 40 Watts
The work done by a machine divided by the amount of work required to operate it
describes ____.
1. Efficiency
2. Percent error
3. Mechanical Advantage
4. Power
A 4.0 kg object is lifted upward by 2.0 meters. The increase in its gravitational potential energy is:1. 2.0 J
2. 8.0 J
3. 80 J
4. 0.2 J
In a hydraulic system piston A has a larger area than piston B. Which of the following best
describes the relationships of the pressure and force on the two pistons?
1. PA>PB, FA=FB
2. PA<PB, FA>FB
3. PA=PB, FA>FB
4. PA=PB, FA<FB
By applying a pressure over a larger surface hydraulic systems
can multiply a force.1. True
2. False
By applying a pressure over a larger area hydraulic lifts reduce the amount work
required to lift a car.1. True
2. False
Much like simple machines, hydraulic systems can reduce the force you need
to exert but require you to exert that force over a longer distance.
1. True
2. False
A1=50 cm2 A2=450 cm2 F1=750 N P1=? P2=?
1. P1=15 Pa P2=135 Pa
2. P1=150 kPa P2=150 kPa
3. P1=135 kPa P2=15 kPa
4. P1=37.5 kPa P2=337.5 kPa
A rock hangs from a spring scale. The scale reads 5.0 N when the rock is in the air, and 3.0 N when it is submerged in water. What
is the buoyant force acting on the rock?
1. 5.0 N
2. 3.0 N
3. 2.0 N
4. 8.0 N
5. None of these
An object that is partly or entirely immersed in a liquid is buoyed up
by a force that is:1. Equal to its own
weight
2. Equal to the weight of the fluid it displaces.
3. Equal to the density of the fluid it is in.
4. Equal to the volume of the fluid it is in.
A block of styrofoam floats on a lake while a block of lead with equal volume lies
submerged at the bottom of the lake. The
buoyant force is greatest on the:1. Styrofoam
2. Lead
3. Is the same for both
Compared to an empty ship, the same ship loaded with styrofoam
will float:1. Higher in the
water
2. Lower in the water
3. At the same level in the water.
Water pressure is greatest against the _____
1. Top of a submerged object
2. Bottom of a submerged object
3. Sides of a submerged object
4. None of these
What is the buoyant force acting on a 34,000 N ship that is floating in
the ocean?1. Less than 34,000
N
2. 34,000 N
3. More than 34,000 N
4. Depends on the density of the sea water
What is the weight of water which is displaced by a floating 34,000 N
ship?1. Less than 34,000 N
2. 34,000 N
3. More than 34,000 N
4. Depends on the ship’s shape
5. Depends on the density of the seawater
A completely submerged object always displaces an amount of fluid
equal to its own:1. Volume
2. Weight
3. Density
4. Mass
The lowest possible temperature is:
1. Zero degrees Celsius
2. -273 degrees Celsius
3. 4 Kelvins
4. -273 Kelvins
The force per unit area exerted on a surface is:
1. Density
2. Power
3. Buoyancy
4. Pressure
5. Specific Heat
The first law of thermodynamics states that:
1. The internal energy of a system can be increased by doing work or adding heat.
2. The bouyant force equals the weight of fluid displaced.
3. The entropy of the universe is always increasing.
Systems that are left alone tend to move toward a state of:
1. Greater entropy
2. Less entropy
3. No entropy
One hundred Joules of heat is added to a system that performs 60 Joules of work.
The internal energy change of the system is:
1. 0 J
2. 40 J
3. 60 J
4. 100 J
5. None of these
If a loaf of bread is compressed, its _____
1. Mass decreases
2. Volume increases
3. Density increases
4. None of these
One kilogram of styrofoam has _____ density than one kilogram of
iron
1. A smaller
2. A greater
3. The same
Which has the greater density, a lake full of water or a cup full of
lake water?
1. The cup full of lake water
2. The lake
3. Both have the same density
A wooden block has a mass of 800 g and a volume of 2 cm3. What is
the block’s density?
1. 800 g/cm3
2. 400 g/cm3
3. 1600 g/cm3
4. 0.4 g/cm3
5. 0.025 cm3/g
If the mass of an object doubled while its volume remained the
same its density would:
1. Halve
2. Double
3. Stay the same
When you touch a cold piece of ice with your finger
1. Energy is transferred from your finger to the ice
2. Cold is transferred from the ice to your finger
3. The total energy of the system increases
Compared to a giant iceberg, a hot cup of coffee has ____.
More
inte
rnal
ener
gy...
Hig
her te
mper
ature
, ...
Nei
ther
of t
hese.
0% 0%0%
0 of 16
1. More internal energy and a higher temperature.
2. Higher temperature, but less internal energy.
3. Neither of these.
Heat energy is measured in units of:
Joule
s
Cal
ories
New
tons
Wat
ts
Both
1 a
nd 2
Both
1 a
nd 4
Both
2 a
nd 3
0% 0% 0% 0%0%0%0%
0 of 16
1. Joules
2. Calories
3. Newtons
4. Watts
5. Both 1 and 2
6. Both 1 and 4
7. Both 2 and 3
When a chocolate bar is cut in half its density is…
Hal
ved
Unch
anged
Doubl
ed
0% 0%0%
0 of 16
1. Halved
2. Unchanged
3. Doubled
A wooden block has a mass of 800 g and a volume of 2 cm3. What is
the block’s weight on Earth?
About
8,0
00 N
About
0.8
kg
About
400
N
About
160
0 N
About
8.0
N
0% 0% 0%0%0%
0 of 16
1. About 8,000 N
2. About 0.8 kg
3. About 400 N
4. About 1600 N
5. About 8.0 N
One liter of water has a mass of:
1 k
g 1
N
Both
of t
hese
Nei
ther
of t
hese
0% 0%0%0%
0 of 16
1. 1 kg
2. 1 N
3. Both of these
4. Neither of these
A unit that equals 1 N/m2 is the:
Wat
t
Cal
orie
Joule
Pas
cal
0% 0%0%0%
1. Watt
2. Calorie
3. Joule
4. Pascal
0 of 16
A substance can absorb heat energy by the process of:
Condu
ctio
n
Conve
ctio
n
Rad
iatio
n
All
of thes
e
0% 0%0%0%
0 of 16
1. Conduction
2. Convection
3. Radiation
4. All of these
The relationship between heat energy and temperature change is
given by the formula:
Q=m
cDT
DL=a
LoDT
PV=n
RT
P=W
/t
0% 0%0%0%
0 of 16
1. Q=mcDT
2. DL=aLoDT
3. PV=nRT
4. P=W/t
If the volume of an object were to double while its mass stays the
same, its density would:
Hal
ve
Doubl
e
Sta
y th
e sa
me
0% 0%0%
0 of 16
1. Halve
2. Double
3. Stay the same
The air in this room has:
Mas
s
Wei
ght
Ener
gy
All
of thes
e
None
of the
se
0% 0% 0%0%0%
0 of 16
1. Mass
2. Weight
3. Energy
4. All of these
5. None of these
10
A suction cup sticks to a wall. It is ____.
Pulle
d to
the
wall b
y ...
Push
ed to
the
wal
l by.
..
Both
of t
hese
Nei
ther
of t
hese
0% 0%0%0%
0 of 16
1. Pulled to the wall by the vacuum
2. Pushed to the wall by the atmosphere
3. Both of these
4. Neither of these
10
Units of Hertz (Hz) describe the:
Num
ber o
f sec
onds ...
Num
ber o
f cyc
les
pe...
Num
ber o
f gra
ms
p..
Num
ber o
f met
ers
f...
0% 0%0%0%
0 of 16
1. Number of seconds per cycle
2. Number of cycles per second
3. Number of grams per mL
4. Number of meters from crest to crest
10
Which formula correctly describes the relationship between wave
properties?
l=f/v
T=v/
f v
=lf
v/T
=l
0% 0%0%0%
0 of 16
1. l=f/v
2. T=v/f
3. v=lf4. v/T=l
10
The rate at which waves transmit energy is proportional to their:
Wav
elen
gth
Am
plitude
Am
plitude
squa
red
Per
iod s
quar
ed
0% 0%0%0%
0 of 16
1. Wavelength
2. Amplitude
3. Amplitude squared
4. Period squared
10
A wave makes 30 oscillations in 6.0 seconds. Its period is ___ and its
frequency is ____.
5 s
, 5 H
z
0.2
s, 5
Hz
5 s
, 180
Hz
24
s, 3
6 Hz
5 s
, 0.2
Hz
0% 0% 0%0%0%
0 of 16
1. 5 s, 5 Hz
2. 0.2 s, 5 Hz
3. 5 s, 180 Hz
4. 24 s, 36 Hz
5. 5 s, 0.2 Hz
10
The speed of light in vacuum is:
343
m/s
9.8
m/s
3.0
x 1
08 m
/s
1.0
15 x
105
m/s
0% 0%0%0%
0 of 16
1. 343 m/s
2. 9.8 m/s
3. 3.0 x 108 m/s
4. 1.015 x 105 m/s
10
The index of refraction of a material is equal to:
c/v
c-v v
/c
q1/
q2
0% 0%0%0%
0 of 16
1. c/v
2. c-v
3. v/c
4. 1/ 2q q
10
Which of the following is NOT a way that waves change direction?
Ref
lect
ion
Inte
rfere
nce
Diff
ract
ion
Ref
ract
ion
0% 0%0%0%
0 of 16
1. Reflection
2. Interference
3. Diffraction
4. Refraction
10
The bending of a ray as it crosses an interface and enters a new
medium is:
Ref
ract
ion
Doppl
er e
ffect
Diff
ract
ion
Thin
film
inte
rfere
nce
0% 0%0%0%
0 of 16
1. Refraction
2. Doppler effect
3. Diffraction
4. Thin film interference
10
A white shirt is dyed with a pigment that absorbs blue light. When
viewed in white light the shirt will appear:
Blu
e R
ed
Yel
low
Gre
en
0% 0%0%0%
0 of 16
1. Blue
2. Red
3. Yellow
4. Green
10
The part of the electromagnetic spectrum with the longest
wavelength is:
Vis
ible
light
X-ra
ys
Rad
io W
aves
Infra
red
0% 0%0%0%
0 of 16
1. Visible light
2. X-rays
3. Radio Waves
4. Infrared
10
Sound waves are classified as:
Longi
tudin
al m
echa
nic..
Tra
nsver
se e
lect
rom
...
0%0%
0 of 16
1. Longitudinal mechanical waves
2. Transverse electromagnetic waves
10
For a closed tube, only the ____ harmonics are present.
Eve
n O
dd
Prim
e
All
the
harm
onics
ar..
.
0% 0%0%0%
0 of 16
1. Even
2. Odd
3. Prime
4. All the harmonics are present
10
_____ is when you drive a system at its natural frequency.
Inte
rfere
nce
Bea
ts
Diff
ract
ion
Res
onance
0% 0%0%0%
0 of 16
1. Interference
2. Beats
3. Diffraction
4. Resonance
10
The pitch of a sound is most closely associated with the ____ of
the wave.
Spee
d
Am
plitude
Fre
quency
Med
ium
0% 0%0%0%
0 of 16
1. Speed
2. Amplitude
3. Frequency
4. Medium
10
The speed at which a wave propagates is determined primarily
by:
The
sourc
e
The
proper
ties
of th.
..
The
wav
elen
gth
The
amplit
ude
0% 0%0%0%
0 of 16
1. The source
2. The properties of the medium.
3. The wavelength
4. The amplitude
10
The bending of waves around a barrier is an example of:
Diff
ract
ion
Ref
ract
ion
Inte
rfere
nce
Res
onance
0% 0%0%0%
0 of 16
1. Diffraction
2. Refraction
3. Interference
4. Resonance
10
If red light is added to cyan light the resulting light will be:
Bla
ck
Whi
te
Red
dish
gre
en
Purp
le
0% 0%0%0%
0 of 16
1. Black
2. White
3. Reddish green
4. Purple
10
The color of light is most closely associated with the:
Wav
elen
gth
Am
plitude
Spee
d
Inte
nsity
0% 0%0%0%
0 of 16
1. Wavelength
2. Amplitude
3. Speed
4. Intensity
10
The primary colors of light are:
Red
, Blu
e, a
nd Yel
low
Mag
enta
, Cya
n, and
Y...
Red
, Blu
e, a
nd Gre
en
Whi
te, B
lack
, and G
ray
0% 0%0%0%
0 of 16
1. Red, Blue, and Yellow
2. Magenta, Cyan, and Yellow
3. Red, Blue, and Green
4. White, Black, and Gray
10
The formula that describes the how a ray of light refracts is:
c=lf
f=1/
T
q1=
q2
n1s
inq1=
n2sin
q2
0% 0%0%0%
0 of 16
1. c=lf2. f=1/T
3. q1=q2
4. n1sinq1=n2sinq2
10
A line constructed perpendicular to the interface is called the:
Med
ium
Inci
dent r
ay
Norm
al
Dire
ctrix
0% 0%0%0%
0 of 16
1. Medium
2. Incident ray
3. Normal
4. Directrix
10
When light travels from a material with a large index of refraction into one with a
smaller index of refraction the transmitted ray:
Get
s ben
t towar
d the.
..
Does
not
chan
ge di
re...
Can
’t pos
sibl
y ex
per...
Get
s ben
t aw
ay fr
om t.
.
0% 0%0%0%
0 of 16
1. Gets bent toward the normal
2. Does not change direction
3. Can’t possibly experience total internal reflection
4. Gets bent away from the normal
10