Sound waves are produced
by
a.
b.
c.
d.
e.
radio stations.
vibrating objects.
soft objects.
objects under pressure.
none of the above
Sound waves are produced
by
a.
b.
c.
d.
e.
radio stations.
vibrating objects.
soft objects.
objects under pressure.
none of the above
A sound wave is a
a.
b.
c.
d.
e.
standing wave.
longitudinal wave.
transverse wave.
shock wave.
none of the above
A sound wave is a
a.
b.
c.
d.
e.
standing wave.
longitudinal wave.
transverse wave.
shock wave.
none of the above
An explosion occurs 340,000 m
away. Given that sound travels
at 340 m/s, the time the sound
takes to reach you is
a.
b.
c.
d.
e.
1 s.
10 s.
100 s.
200 s.
more than 200 s.
An explosion occurs 340,000 m
away. Given that sound travels
at 340 m/s, the time the sound
takes to reach you is
a.
b.
c.
d.
e.
1 s.
10 s.
100 s.
200 s.
more than 200 s.
Which of the following would
be most likely to transmit
sound with the highest speed?
a.
b.
c.
d.
e.
Steel in a bridge
Wood in a cabinet
Water in the ocean
Water in a swimming pool
Air in your classroom
Which of the following would
be most likely to transmit
sound with the highest speed?
a.
b.
c.
d.
e.
Steel in a bridge
Wood in a cabinet
Water in the ocean
Water in a swimming pool
Air in your classroom
Sound waves cannot travel in
a. steel.
b. air.
c. a vacuum.
d. water.
e. Sound can travel in all of
the above.
Sound waves cannot travel in
a. steel.
b. air.
c. a vacuum.
d. water.
e. Sound can travel in all of
the above.
The speed of a sound wave
depends on
a.
b.
c.
d.
e.
the air temperature.
its frequency.
its wavelength.
all of the above
none of the above
The speed of a sound wave
depends on
a.
b.
c.
d.
e.
the air temperature.
its frequency.
its wavelength.
all of the above
none of the above
Sound travels faster in air if
the air is
a.
b.
c.
neither warm nor cold.
cold.
warm.
Sound travels faster in air if
the air is
a.
b.
c.
neither warm nor cold.
cold.
warm.
An oceanic depth-sounding vessel
surveys the ocean bottom with
ultrasonic sound that travels 1530
m/s in seawater, and finds a 10second time delay of the echo to the
ocean floor and back. The ocean
depth there is
a.
b.
c.
d.
e.
1700 m.
3400 m.
7650 m.
15300 m.
none of the above
An oceanic depth-sounding vessel
surveys the ocean bottom with
ultrasonic sound that travels 1530
m/s in seawater, and finds a 10second time delay of the echo to the
ocean floor and back. The ocean
depth there is
a.
b.
c.
d.
e.
1700 m.
3400 m.
7650 m.
15300 m.
none of the above
If the sounding board were
left out of a music box, the
music box would
a. not sound at all.
b. make little "plinks" that
you could hardly hear.
c. sound the same as
usual.
If the sounding board were
left out of a music box, the
music box would
a. not sound at all.
b. make little "plinks"
that you could hardly hear.
c. sound the same as
usual.
Resonance occurs when
a.
sound changes speed in
going from one medium to another.
b.
sound makes multiple
reflections.
c.
the amplitude of a wave is
amplified.
d.
an object is forced to vibrate
at its natural frequency.
e.
all of the above
Resonance occurs when
a.
sound changes speed in
going from one medium to another.
b.
sound makes multiple
reflections.
c.
the amplitude of a wave is
amplified.
d.
an object is forced to
vibrate at its natural frequency.
e.
all of the above
Electromagnetic waves
a. need a medium to travel
through.
b. can travel through a
vacuum.
Electromagnetic waves
a. need a medium to travel
through.
b. can travel through a
vacuum.
If the sun were to disappear right
now, we wouldn't know about it
for 8 minutes because it takes 8
minutes
a. to operate receiving
equipment in the dark.
b. for light to travel from the
sun to Earth.
c. for the sun to disappear.
d. all of the above
e. none of the above
If the sun were to disappear right
now, we wouldn't know about it
for 8 minutes because it takes 8
minutes
a. to operate receiving
equipment in the dark.
b. for light to travel from the
sun to Earth.
c. for the sun to disappear.
d. all of the above
e. none of the above
Which of these
electromagnetic waves has
the shortest wavelength?
a.
b.
c.
d.
e.
Infrared waves
Light waves
Radio waves
X-rays
Ultraviolet waves
Which of these
electromagnetic waves has
the shortest wavelength?
a.
b.
c.
d.
e.
Infrared waves
Light waves
Radio waves
X-rays
Ultraviolet waves
Compared to the wavelength
of ultraviolet waves, the
wavelength of infrared
waves is
a.
b.
c.
the same.
shorter.
longer.
Compared to the wavelength
of ultraviolet waves, the
wavelength of infrared
waves is
a.
b.
c.
the same.
shorter.
longer.
Compared to the velocity of
radio waves, the velocity of
visible light waves is
a.
b.
c.
slower.
faster.
the same.
Compared to the velocity of
radio waves, the velocity of
visible light waves is
a.
b.
c.
slower.
faster.
the same.
The main difference between
a radio wave and a light
wave is its
a.
b.
c.
d.
speed.
wavelength.
both A and B
none of the above.
The main difference between
a radio wave and a light
wave is its
a.
b.
c.
d.
speed.
wavelength.
both A and B
none of the above.
Heat lamps give off mostly
a.
b.
c.
d.
e.
X-rays.
infrared waves.
ultraviolet waves.
microwaves.
radio waves.
Heat lamps give off mostly
a.
b.
c.
d.
e.
X-rays.
infrared waves.
ultraviolet waves.
microwaves.
radio waves.
Electromagnetic waves
with higher frequencies
have wavelengths that are
a.
b.
shorter.
longer.
Electromagnetic waves
with higher frequencies
have wavelengths that are
a.
b.
shorter.
longer.
What is the ultimate source
of electromagnetic waves?
a. Vibrating atoms
b. Vibrating molecules
c. Radio sets
d. Vibrating charged
particles
e. TV antennas
What is the ultimate source
of electromagnetic waves?
a. Vibrating atoms
b. Vibrating molecules
c. Radio sets
d. Vibrating charged
particles
e. TV antennas
Compared to its speed in air,
the speed of light in water is
a.
b.
c.
slower.
the same.
faster.
Compared to its speed in air,
the speed of light in water is
a.
b.
c.
slower.
the same.
faster.
The shiny surfaces of metals
have most to do with
a. metals' relatively high
density.
b. a resonant frequency of
electrons in the metal.
c. the fact that light reflects
from metals.
d. the free electrons in
metal atoms.
The shiny surfaces of metals
have most to do with
a. metals' relatively high
density.
b. a resonant frequency of
electrons in the metal.
c. the fact that light reflects
from metals.
d. the free electrons in
metal atoms.
Clouds
a. neither block nor
transmit UV light.
b. block UV light.
c. transmit UV light.
Clouds
a. neither block nor
transmit UV light.
b. block UV light.
c. transmit UV light.
Light does not pass through
what kind of materials?
a.
b.
c.
transparent
opaque
neither a nor b
Light does not pass through
what kind of materials?
a.
b.
c.
transparent
opaque
neither a nor b
The shadow produced by an
object held close to a piece
of paper in sunlight will be
a.
b.
sharp.
fuzzy.
The shadow produced by an
object held close to a piece
of paper in sunlight will be
a.
b.
sharp.
fuzzy.
Solar eclipses are seen less
commonly than lunar eclipses
because
a.
the sun is so much larger than
the moon.
b.
the sun is farther from Earth
than is the moon.
c.
solar eclipses don't happen as
often as lunar eclipses.
d.
Earth's shadow on the moon is
larger than the moon's shadow on
Earth.
e.
none of the above
Solar eclipses are seen less
commonly than lunar eclipses
because
a.
the sun is so much larger than
the moon.
b.
the sun is farther from Earth
than is the moon.
c.
solar eclipses don't happen as
often as lunar eclipses.
d.
Earth's shadow on the moon
is larger than the moon's shadow
on Earth.
e.
none of the above
Consider a pulse of laser light aimed from
the Earth bounces off the moon and
comes back to Earth. The distance
between Earth and the moon is 3.8 X
108 meters and the speed of light is 3.0
X 108 meters/sec.
a. How many seconds will it take for
the laser to make the entire trip?
b. Why does an astronaut on the moon
have to be patient in talking with
Mission Control on Earth?
When you look at a distant
galaxy through a
telescope, how is it that
you are looking backwards
in time?