A convex lens is placed on a flat glass plate and illuminated from above with
monochromatic red light. When viewed from above, concentric bands of red and dark
are observed. What does one observe at the exact center of the lens where the lens and
the glass plate are in direct contact?
A) a bright red spot
B) a dark spot
C) a rainbow of color
D) a bright spot that is some color other than red
A “parallel ray” is a ray parallel to the
A) mirror radius
B) object axis
C) chief ray
D) optic axis
How much energy is released in the reaction 2H + 2H → 4He? [m(2H) = 2.012102 u,
m(4He) = 4.002603 u]
A) 20 MeV
B) 18 MeV
C) 13 MeV
D) 12 MeV
E) 36 MeV
Louis de Broglie
A) set the limits on the probability of measurement accuracy (1927).
B) suggested the existence of matter waves (1924).
C) predicted the positron from relativistic quantum mechanics (1928).
D) developed a wave equation for matter waves (1926).
E) was the first to produce X-ray-like diffraction patterns of electrons passing through
thin metal foil (1927).
A golf club exerts an average force of 1000 N on a 0.045-kg golf ball which is initially
at rest. The club is in contact with the ball for 1.8 ms. What is the speed of the golf ball
as it leaves the tee?
A) 30 m/s
B) 35 m/s
C) 40 m/s
D) 45 m/s
E) 50 m/s
A gas is allowed to expand at constant pressure as heat is added to it. This process is
A) isothermal.
B) adiabatic.
C) isobaric.
D) isometric.
E) isentropic.
A mirror with a focal length 20 cm has a 4.0 cm tall object placed 100 cm in front of it.
What is the position of the image?
A) 25 cm behind the mirror
B) 20 cm behind the mirror
C) 20 cm in front of the mirror
D) 25 cm in front of the mirror
E) 100 cm in front of the mirror
A copper wire is found to break when subjected to minimum tension of 36. N. If the
wire diameter were half as great, we would expect the wire to break when subjected to a
minimum tension of
A) 36. N
B) 26. N
C) 18 N
D) 9.0 N
E) 51. N
What is the theoretical efficiency of a Carnot engine that operates between 600 K and
300 K?
A) 100%
B) 75%
C) 25%
D) 50%
E) 0%
Sixty miles/hour is about how many meters/second?
A) 96
B) 112
C) 1.6
D) 27
E) 37
Consider a rigid body that is rotating. Which of the following is an accurate statement?
A) Its center of rotation must be at rest, i.e., not moving.
B) Its center of rotation must be moving with a constant velocity.
C) All points on the body are moving with the same angular velocity.
D) Its center of rotation is its center of gravity.
E) All points on the body are moving with the same linear velocity.
When a nucleus undergoes beta-minus decay, it changes into
A) another isotope of itself.
B) a higher mass number.
C) a higher atomic number.
D) a higher neutron number.
E) a lower proton number.
Simple pendulum A swings back and forth at twice the frequency of simple pendulum
B. Which statement is correct?
A) Amplitude of pendulum A is twice that of B.
B) Amplitude of B is twice of A.
C) Amplitude of A is 1.41 that of B.
D) Amplitude of B is 1.41 that of A.
E) Amplitude can not be determined from data given.
Negative temperature coefficients of resistivity
A) exist in superconductors.
B) do not exist.
C) exist in semiconductors.
D) exist in conductors.
If you connect two identical storage batteries together in series (“+” to “-“), and place
them in a circuit, the combination will provide
A) zero volts.
B) the same voltage, and different currents will flow through each.
C) twice the voltage, and the same current will flow through each.
D) the same voltage and the same current will flow through each.
E) twice the voltage, and different currents will flow through each.
Electrons carry a
A) positive charge.
B) negative charge.
C) neutral charge.
D) Variable charge.
The SI unit of length, the meter, is currently defined
A) as 10-7 of the distance from the North Pole to the equator along a meridian running
through Paris.
B) as the length of the path traveled by light in a vacuum during 1/299792485 s.
C) by the President’s foot.
D) as the distance between two marks on a metal bar make of a platinum-iridium alloy
kept at the National Bureau of Standards.
E) 1,553,164.1 wavelengths of red cadmium light in dry air at 25C.
A ly (light year) is the distance that light travels in one year. The speed of light is 3.00 x
108 m/s. How many miles are there in a ly?
(1 mi = 1609 m and 1 yr = 365.25 days)
A) 9.46 x 1012 mi
B) 9.46 x 1015 mi
C) 5.88 x 1012 mi
D) 5.88 x 1015 mi
E) 2.87 x 1013 mi
FIGURE 13-2
A mass swinging on the end of a massless string, as shown in Fig. 13-2, undergoes
SHM. Where is the instantaneous acceleration of the mass greatest?
A) A and C
B) B
C) C
D) A and D
E) A and B
Light of wavelength 550 nm in air is found to travel at 1.96 x 108 m/s in a certain
liquid. Determine
(a) the frequency of the light in the liquid.
(b) the wavelength of the light in the liquid.
A mass vibrates back and forth from the free end of an ideal spring (k = 20. N/m) with
an amplitude of 0.30 m. What is the kinetic energy of this vibrating mass when it is 0.30
m from its equilibrium position?
A) 1.4 J
B) 0.90 J
C) zero
D) 0.45 J
E) It is impossible to give an answer without knowing the object’s mass.
A basketball is thrown with a velocity of 20. m/s at an angle of 60. above the horizontal.
What is the horizontal component of its instantaneous velocity at the exact top of its
trajectory? (Neglect air friction.)
A) 10. m/s
B) zero
C) 20. m/s
D) 17.3 m/s
E) 20. tan(60) m/s
A gas undergoes a process A-B that traces a straight line in the p-V diagram. At A the
gas has a pressure of 75 kPa and a volume of 12 L. At B the pressure is 60 kPA and the
volume is 20 L. The heat gained in this process is 600 J. The internal energy of the gas
at A is 70 J. What is the internal energy of the gas at B?
A) 60 J
B) 10 J
C) 190 J
D) 130 J
E) 70 J
FIGURE 6-3
A bullet of mass 20. g, traveling at 350. m/s, strikes a steel plate at an angle of 30. with
the plane of the plate. It ricochets off at the same angle, at a speed of 320. m/s, as
shown in Fig. 6-3. What is the magnitude of the impulse that the wall gives to the
bullet?
A) 0.52 N∙s
B) 4.3 N∙s
C) 6.7 N∙s
D) 0.30 N∙s
E) 0.30 kN∙s
When two or more resistors are connected in series to a battery
A) the total voltage across the combination is the algebraic sum of the voltages across
the individual resistors.
B) the equivalent resistance of the combination is equal to the sum of the resistances of
each resistor.
C) the same current flows through each resistor.
D) all of the other choices are true.
When an object is placed 60. cm from a converging lens, it forms a real image. When
the object is moved to 40. cm from the lens, the image moves 10. cm farther from the
lens. What is the focal length of the lens?
A) 42. cm
B) 50. cm
C) 40. cm
D) 20. cm
E) 30. cm
The thermal conductivity of aluminum is twice that of brass. Two rods (one aluminum
and the other brass) are joined together end to end in excellent thermal contact. The
rods are of equal lengths and radii. The free end of the brass rod is maintained at 0°C
and the aluminum’s free end is heated to 200°C. If no heat escapes from the sides of the
rods, what is the temperature at the interface between the two metals?
A) 76°C
B) 133°C
C) 155°C
D) 148°C
E) 92°C
The intensity at a distance of 6.0 m from a source is 6 X 10-10 W/m2.
(a) What is the power level emitted by the source?
(b) What is the intensity level in dB?
A force of 120 N is applied to an object whose mass is 30 kg. The object’s acceleration
is
A) 3600 m/s2.
B) 150 m/s2.
C) 4.0 m/s2.
D) 2.0 m/s2.
E) 0.25 m/s2.
A series RL circuit is driven by a 120. V, 60. Hz source. The values of the resistance and
inductance are R = 20.0 Ω and L = 160. mH. Determine:
(a) the current.
(b) the phase angle between the current and the applied voltage.
A proton, moving freely, has a wavelength of 0.600 pm.
(a) What is its momentum?
(b) What is its speed?
(c) Through what potential difference might it have been accelerated through, from rest,
to reach this speed?
A coffee maker, which draws 13.5 A of current, has been left on for 10.0 min. What is
the net number of electrons that have passed through the coffee maker?
Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet,
yellow.
A small gas laser of the type used in classrooms may radiate light at a power level of
2.0 mW. If the wavelength of the emitted light is 642. nm, how many photons are
emitted per second?
A combination of 2.0 Ω in series with 4.0 Ω is connected in parallel with 3.0 Ω. What is
the equivalent resistance?
Express the following number to three significant figures: 21.25 m
A mass of 50. kg is suspended from a steel wire of diameter 1.0 mm and length 11.2 m.
How much will the wire stretch? (The Young’s modulus for steel is 20 1010 N/m2.)
A window for viewing fish in the local aquarium is square and measures
0.8 m 0.8 m. Its center is 12. m below the surface. What is the total force on the
window?
What is the ratio of the power levels of two sounds with intensity levels of 40. dB and
70. dB?
What is the radius of the electron orbit in a singly ionized helium ion?
An ideal transformer has 60. turns on its primary coil and 300. turns on its secondary
coil. If 120. V at 2.0 A is applied to the primary, what voltage and current are present in
the secondary?
State the law of the conservation of mechanical energy.
Define power.
Express the result of the following calculation, to the proper number of significant
figures: (0.02739) x (-240,000)
The threshold energy to initiate a certain nuclear reaction is 3.16 MeV and the Q for the
reaction is -2.37 MeV. The stationary target is how many times as massive as the
incident particle?
State Lenz’s Law.
Define mechanical work.
FIGURE 7-2
A girl attaches a rock to a string, which she then swings counter-clockwise in a
horizontal circle. The string breaks at point P in Fig. 7-2, which shows a bird’s-eye view
(i.e., as seen from above). Which path (A-E) will the rock follow?
Two resistors in series equal 9.0 ohms total; but the same two resistors in parallel are
equivalent to 2.0 ohms. What are the resistor values?