# Physics Final

45 Questions
• 1.
The explanation for refraction must involve a change in
• A.

Frequency

• B.

Speed

• C.

Wavelength

• D.

All of these

• E.

None of these

• 2.
One AMU is the mass of
• A.

One proton and one neutron.

• B.

An electron.

• C.

1/12th of the mass of carbon-12

• D.

An “amorphous monopole unit.”

• E.

None of the above.

• 3.
Wave interference occurs for
• A.

Water waves.

• B.

Light waves

• C.

Sound waves

• D.

All of these

• E.

None of these

• 4.
A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?
• A.

3 Hz

• B.

0.5 Hz

• C.

1 Hz

• D.

2 Hz

• 5.
High pitched sound has a high
• A.

Number of partial tones

• B.

Speed

• C.

Frequency

• D.

All of these

• E.

None of these

• 6.
Suppose you sound a 1056-Hz tuning fork at the same time you strike a note on the piano and hear 2 beats/second. You tighten the piano string very slightly and now hear 3 beats/second. What is the frequency of the piano string?
• A.

1059 Hz

• B.

3 Hz

• C.

3168 Hz

• D.

333 Hz

• E.

352 Hz

• 7.
If at a concert, a wind blows directly from the orchestra toward you, the frequency of the sound you hear will be
• A.

Decreased

• B.

Increased

• C.

Neither decreased or increased

• 8.
A wave having a frequency of 1000 Hz vibrates at
• A.

More than 1000 cycles per second.

• B.

Less than 1000 cycles per second.

• C.

1000 cycles per second.

• 9.
A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 m in 1 s, its wavelength is
• A.

1 m.

• B.

0.5 m.

• C.

2 m.

• D.

3 m.

• E.

6 m.

• 10.
The vibrations of a longitudinal wave move in a direction
• A.

Along the direction of wave travel.

• B.

At right angles to the direction of wave travel.

• 11.
A floating leaf oscillates up and down two complete cycles in 1 s as a water wave passes by. The wave's wavelength is 10 m. What is the wave's speed?
• A.

40 m/s

• B.

10 m/s

• C.

2 m/s

• D.

20 m/s

• E.

More than 40 m/s

• 12.
The frequency of the second hand on a clock is
• A.

1/60 Hz

• B.

60 Hz

• C.

1 Hz.

• 13.
A boat at anchor is rocked by waves whose crests are 40 m apart and whose speed is 10 m/s. These waves reach the boat once every
• A.

30 s.

• B.

0.25 s

• C.

4.0 s

• D.

400 s.

• 14.
A single raindrop illuminated by sunshine disperses
• A.

A single color.

• B.

All the colors of the rainbow.

• C.

Either low, middle, or high frequency colors in most cases.

• 15.
If you walk toward a mirror at a certain speed, the relative speed between you and your image is
• A.

• B.

• C.

• D.

None of these

• 16.
The vibrational direction of the electron and the plane of polarization of the light it emits
• A.

Are the same

• B.

Are at right angles to each other

• C.

Are independent of each other

• D.

May or may not be at right angles to each other.

• 17.
Which of the following is fundamentally different from the others?
• A.

• B.

X rays

• C.

Gamma rays

• D.

Sound waves

• E.

Light waves

• 18.
Polarization is a property of
• A.

Longitudinal waves

• B.

Transverse waves

• C.

Both

• D.

Neither

• 19.
The source of all electromagnetic waves is
• A.

Vibrating charges

• B.

Electric fields.

• C.

Heat

• D.

Magnetic fields

• E.

None of these

• 20.
Different colors are dispersed by a prism because different colors in the prism have different
• A.

Directions

• B.

Energies

• C.

Speeds

• D.

Frequencies

• E.

None of these

• 21.
It is difficult to see the roadway in front of you when you are driving on a rainy night mainly because
• A.

Of added condensation on the inner surface of the windshield.

• B.

Light scatters from raindrops and cuts down the light to reach your eyes.

• C.

The film of water on your windshield provides an additional reflecting surface

• D.

The film of water on the roadway makes the road less diffuse.

• E.

None of these

• 22.
Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the
• A.

Clear

• B.

Green

• C.

Neither, it will be the same in each

• 23.
If the Sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes
• A.

For light to travel from Sun to Earth

• B.

To operate receiving equipment in the dark

• C.

For the Sun to disappear

• 24.
Complementary colors are two colors that
• A.

Look good together

• B.

Produce white light when added together

• C.

Are subtractive primary colors

• 25.
List the following atoms in order of increasing atomic size: Thallium, Tl;  Germanium, Ge; Tin, Sn; Phosphorus, P.
• A.

Tl < Sn < P < Ge

• B.

P < Ge < Sn < Tl

• C.

Tl < Sn < Ge < P

• D.

Ge < P < Sn < Tl

• 26.
The following statement describes which subatomic particle best?  It is electrically charged.
• A.

An electron

• B.

A proton

• C.

A neutron

• D.

A and B

• E.

B and C

• 27.
What vibrates within an atom as it emits electromagnetic waves?
• A.

The electron

• B.

Vibration within the atom is not the cause of the emission of electromagnetic waves.

• C.

Nothing vibrates within an atom. Vibration would make an atom unstable.

• D.

The nucleus

• 28.
The element bromine, Br (atomic number 35), has two major isotopes of similar  abundance, both around 50 percent. The atomic mass of bromine is reported in the  periodic table as 79.904 atomic mass units. Choose the most likely set of mass numbers  for these two bromine isotopes.
• A.

Br-80, Br-81

• B.

Br-78, Br-80

• C.

Br-79, Br-80

• D.

Br-79, Br-81

• 29.
Which of the following elements are in the same group as silicon (Si)?
• A.

P

• B.

C

• C.

As

• D.

B

• E.

None of the above

• 30.
Which color of light comes from the higher energy transition, red or blue?
• A.

Red is a higher frequency and therefore corresponds to a higher energy level transition.

• B.

Red is a higher frequency and therefore corresponds to a lower energy level transition.

• C.

Blue is a higher frequency and therefore corresponds to a lower energy level transition

• D.

Blue is a higher frequency and therefore corresponds to a higher energy level transition.

• 31.
Considering how small atoms are, what are the chances that at least one of the atoms  exhaled in your first breath will be in your last breath?
• A.

Very probable because of how incredibly small atoms are

• B.

Not very likely because atoms are constantly dematerializing

• C.

Not possible at all because atom don't last that long

• D.

There's not really a way that scientists are able to make such an estimate.

• 32.
If you remove two protons and two electrons from a sulfur atom (S), what new  element is formed?
• A.

Ar -2

• B.

Al

• C.

Al+2

• D.

Si+2

• E.

Si

• 33.
If two protons and two neutrons are removed from the nucleus of an oxygen atom, a  nucleus of which element remains?
• A.

Carbon-14

• B.

Nitrogen-12

• C.

Carbon-12

• D.

Neon-18

• 34.
The nucleus of an electrically neutral iron atom contains 26 protons. How many  electrons does this iron atom have?
• A.

52

• B.

26

• C.

None

• D.

24

• 35.
Which of the following elements is in the fourth period?
• A.

Chromium (Cr)

• B.

Hydrogen (H)

• C.

Carbon (C)

• D.

zirconium (Zr)

• E.

Beryllium(Be)

• 36.
Which of the following atoms is the largest?
• A.

Ba

• B.

Be

• C.

Mg

• D.

Sr

• E.

Ca

• 37.
A 340-Hz sound wave travels at 340 m/s in air with a wavelength of
• A.

1

• B.

100

• C.

1000

• D.

10

• E.

None

• 38.
Reverberation is a phenomenon you would be most likely to hear if you sing in the
• A.

Shower

• B.

Flat desert

• 39.
A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its  amplitude is
• A.

1 m

• B.

Less than 1 m

• C.

More than 1 m

• D.

Not enough information to say

• 40.
The phenomenon of beats results from sound
• A.

Interference

• B.

Reflection

• C.

Refraction

• D.

All of these

• E.

None of these

• 41.
A beam of light strikes a plane mirror along a line perpendicular to the plane of the  mirror. The mirror is then rotated through a certain angle. The angle of the reflected beam  relative to the incoming beam is rotated through an angle that is
• A.

Four times as large

• B.

Equal to the angle of rotation.

• C.

Twice as large.

• D.

None of these

• 42.
If the atmosphere were about 40 times thicker, at noon the Sun would appear
• A.

Red-orange

• B.

Blue-violet

• C.

Orange-green

• D.

Green-blue

• E.

None of these

• 43.
A Doppler effect occurs when a source of sound moves
• A.

Away from you

• B.

Toward you

• C.

Both of these

• D.

None of these

• 44.
Which of the following might best explain the reason why electrons are restricted to  certain energy levels in an atom?
• A.

They are out of phase and self-destruct when outside of distinct energy regions.

• B.

They are travelling at very high speeds

• C.

They behave like chaotic waves of alternating frequency

• D.

They behave like restricted waves and are self-reinforcing

• E.

They are interacting with the light around the atom

• 45.
When you tune a radio to a certain station, you match the frequency of the internal  electrical circuit to the frequency of that radio station. In so doing, you are employing the  principle of
• A.

Beats

• B.

Wave interference.

• C.

Resonance

• D.

Forced vibrations

• E.

Reverberation.

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