What happens to the kinetic energy of a speedy proton when its relativistic mass
doubles?
A) It doubles.
B) It more than doubles.
C) It less than doubles.
D) It must increase, but it is impossible to say by how much.
Daisy (50. kg mass) skates on ice at 4.0 m/s to greet her friend (70. kg mass), who is
standing still, with open arms. As they collide, while holding each other, with what
speed do they both move off together?
A) 2.5 m/s
B) 1.7 m/s
C) zero
D) 5.0 m/s
Which of the following binoculars would be best for observing very faint comets
among the stars?
A) 7 60
B) 12 50
C) 5 20
D) 10 35
E) 8 50
FIGURE 23-2
Suppose a lighted candle is placed a short distance from a plane mirror, as shown in
Fig. 23-2. Where will the image of the flame be located?
A) at A
B) at B
C) at C
D) at M (at the mirror)
A 1.0 kg flashlight falls to the floor. At the point during its fall when it is 0.70 m above
the floor, its potential energy exactly equals its kinetic energy. How fast is it moving?
A) 3.7 m/s
B) 6.9 m/s
C) 14 m/s
D) 45 m/s
E) 9.8 m/s
The average power delivered by an AC generator in an RLC circuit is ________ the
product IV where I & V are respectively the current and voltage amplitudes.
A) equal to
B) more than
C) less than
FIGURE 29-1
The neutron-proton stability curve of the isotopes of all elements will be plotted on a
graph whose axes are shown in Fig. 29-1. The plot will look like
A) graph A.
B) graph B.
C) graph C.
D) graph D.
E) none of the above.
A piece of wood 350 mm 350 mm and 15 mm thick conducts heat through its thickness
under steady state conditions. The rate of heat flow is measured to be 14.0 watts when
the temperature difference is 28°C. Determine the coefficient of thermal conductivity
for this wood
A) 9.2 x 10-4 J/(m∙s∙C)
B) 270 J/(m∙s∙C)
C) 16 J/(m∙s∙C)
D) 0.061 J/(m∙s∙C)
E) 33 J/(m∙s∙C)
If the momentum of an electron is 1.95 10-27 kg∙m/s, what is its de Broglie
wavelength?
A) 340 nm
B) 210 nm
C) 170 nm
D) 420 nm
E) 520 nm
Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The
wires are separated by 0.20 m. What is the magnetic field midway between the two
wires?
A) 1.0 x 10-5 T
B) 2.0 x 10-5 T
C) 3.0 x 10-5 T
D) 4.0 x 10-5 T
E) 5.0 x 10-5 T
Consider an Earth satellite in an elliptical orbit. Its centripetal acceleration is
A) zero.
B) > g at the satellite.
C) < g at the satellite.
D) constant.
E) g at the satellite.
A solid cylinder and a hollow cylinder have the same mass and the same radius. Which
statement is true concerning their moment of inertia about an axis through the exact
center of the flat surfaces?
A) The hollow cylinder has the greater moment of inertia.
B) The solid cylinder has the greater moment of inertia.
C) Both cylinders have the same moment of inertia.
D) The moment of inertia cannot be determined since it depends on the amount of
material removed from the inside of the hollow cylinder.
The mass of a mass-and-spring system is displaced 10 cm from its equilibrium position
and released. A frequency of 4 Hz is observed. What frequency would be observed if
the mass had been displaced only 5 cm and then released?
A) 8 Hz
B) 4 Hz
C) 6 Hz
D) 2 Hz
Two Styrofoam balls, of radii R and 2R, are released simultaneously from a tall tower.
Which will reach the ground first?
A) The result will depend on the atmospheric pressure.
B) the larger one
C) Both will reach the ground simultaneously.
D) the smaller one
A fish’s eye is well-suited to seeing under water, but what can you say about his vision
if he is taken out of water?
A) His acuity (sharpness of vision) would be greater.
B) He would suffer from astigmatism.
C) He would be nearsighted.
D) He would be farsighted.
E) His vision would be limited to a cone of half-angle of about 49.
A ball thrown horizontally from a point 24 m above the ground strikes the ground after
traveling horizontally a distance of 18 m. With what speed was it thrown? (in this
problem use g = 10 m/s2)
A) 7.40 m/s
B) 6.10 m/s
C) 8.96 m/s
D) 8.13 m/s
E) g
A wheel slows down uniformly and comes to rest in 15 seconds. It is rotating initially at
2.0 revolutions per second and has a diameter of 50.cm.
(a) What was the centripetal acceleration at the instant when it was rotating initially?
(b) What was the tangential acceleration?
Suppose that an object travels from one point in space to another. Make a comparison
between the displacement and the distance traveled.
A) The displacement is either greater than or equal to the distance traveled.
B) The displacement is always equal to the distance traveled.
C) The displacement is either less than or equal to the distance traveled.
D) The displacement can be either greater than, smaller than, or equal to the distance
traveled.
For the circuit illustrated in Fig. 18-1, write the Kirchhoff current equation for the node
labeled A.
Two pure tones are sounded together and a particular beat frequency is heard. What
happens to the beat frequency if the frequency of one of the tones is increased?
A) It does not change.
B) It decreases.
C) It could either increase or decrease.
D) It increases.
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and
2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the
image of this object is viewed with the eyepiece adjusted for minimum eyestrain. The
near-point distance of the person using the microscope is 25.0 cm. What is the final
magnification of the microscope?
A) -190
B) -240
C) -300
D) -310
E) -470
All isotopes are unstable which have proton number greater than
A) 73.
B) 12.
C) 83.
D) 78.
E) 26.
When adding several quantities, the number of decimal places in the result must always
be
A) larger than the number of decimal places in the most accurate of the quantities.
B) equal to the number of decimal places in the most accurate of the quantities.
C) equal to the average number of significant digits in the most and least accurate of the
quantities.
D) equal to the number of decimal places in the least accurate of the quantities.
E) smaller than the number of decimal places in the least accurate of the quantities.
Which of the following depends on the observer’s frame of reference?
A) the mass of the proton
B) the length of a meter stick
C) the half-life of a muon
D) all of the other answer choices
Resonance in a series RLC circuit occurs when
A) (XL – XC)2 is equal to R2.
B) XL is greater than XC.
C) XC is greater than XL.
D) XL equals XC.
5.0 A at 110 V flows in the primary of a transformer. Assuming 100% efficiency, how
many amps at 24 V can flow in the secondary?
A) 1.1 A
B) 4.6 A
C) 5.0 A
D) 17 A
E) 23 A
A 1.33 kg dense mass is on the end of a 4.50 m “string”.
(a) What would be the period of the pendulum on Earth?
(b) If the mass were doubled, what would be the frequency of oscillation?
(c) What would be the period on the planet Mars where gravity is 38.% that of the
Earth?
What in a DC motor reverses the polarity and current each half-cycle?
A) a CRT
B) solid ring commutator
C) a split ring commutator
D) fuse
Plutonium has a half life of 2.4 x 104 years. How long does it take for 99% of the
plutonium to decay?
A) 1.6 x 106 y
B) 1.6 x 105 y
C) 1.6 x 104 y
D) 1.6 x 103 y
E) 1.6 x 102 y
Sometimes when you look into a curved mirror you see a magnified image (a great big
you!) and sometimes you see a diminished image (a little you). If you look at the
bottom (convex) side of a shiny spoon, what will you see?
A) You will either see a little you or a great big you, depending on how near you are to
the spoon.
B) You will see a little you, upside down.
C) You will see a little you, right side up.
D) You won’t see an image of yourself because no image will be formed.
E) You will see a little you, but whether you are right side up or upside down depends
on how near you are to the spoon.
What is the surface temperature of a star, given that its radiation peak occurs at a
frequency of 1.86 1015 Hz?
A) 17,000 K
B) 14,500 K
C) 19,000 K
D) 20,400 K
E) 18,000 K
If you push a 4-kg mass with the same force that you push a 10-kg mass from rest, then
A) both masses accelerate at the same rate.
B) the 10-kg mass accelerates 2.5 times faster than the 4-kg mass.
C) the 4-kg mass accelerates 2.5 times faster than the 10-kg mass.
D) the 10-kg mass accelerates 4 times faster than the 4-kg mass.
E) the 4-kg mass accelerates 4 times faster than the 10-kg mass.
Why does light seem to go straight through an open doorway whereas sound seems to
spread out when it goes through the same doorway?
What is the energy, in eV, of the n = 3 state in hydrogen?
A tooth polisher on a dentist’s drill reaches a speed of 1800 rpm in 8.0 s. What is its
average angular acceleration?
A diver can change her rate of rotation in the air by “tucking” her head in and bending
her knees. Let’s assume that when she is stretched out straight she is rotating at 1
revolution per second. Now she goes into the “tuck and bend,” effectively shortening
the length of her body by half. What will her rate of rotation be now?
A proton moving at 5.0 104 m/s horizontally enters a region where a magnetic field of
0.12 T is present, directed vertically downward. What magnitude force acts on the
proton?
FIGURE 19-1
An electron enters the velocity selector of a mass spectrometer in the direction shown
Fig. 19-1. If it emerges along the path shown, which plate (A or B) has the higher
potential?
A Carbon-14 nucleus decays to a Nitrogen-14 nucleus by beta decay. How much energy
(in MeV) is released if Carbon-14 has a mass of 14.003074 u and Nitrogen-14 has a
mass of 14.003242 u?
A mine railroad car, of mass 200 kg, rolls with negligible friction on a horizontal track
with a speed of 10.0 m/s. A 70. kg stunt man drops straight down a distance of 4.0 m,
and lands in the car. How fast will the car be moving after this happens?
State the Third Law of Thermodynamics.
Describe how a simple electric cell works.
FIGURE 23-8
A lens projects an image of a man as seen in Fig. 23-8. Rays marked A, B, and C travel
to the lens from the man’s ear.Draw the three refracted rays as they proceed to the right
of the lens; noting that A is parallel to the axis, B goes through the center of the lens, C
proceeds to the bottom of the lens, and the point marked f is the focal point of the lens.
State the difference between pure translational and pure rotational motion.
At what frequency does a 10. μF capacitor have a reactance of 0.12 kΩ?
Explain the process through which kinetic energy is lost in an inelastic collision.
How is it possible for the angular magnification to be large and, at the same time, for
the lateral magnification to be small? Give an example.
Consider a motorcycle of mass 150. kg, one wheel of which has a mass of 10. kg and a
radius of 30. cm. What is the ratio of the rotational kinetic energy of the wheels to the
total translational kinetic energy of the bike? Assume the wheels are uniform disks.
State the six general problem-solving steps given in the text.
What is the approximate nuclear radius of an isotope of sodium with 11 protons and 12
neutrons?
Starting with 235U, assume the following sequence of decays occur:
(1) alpha decay
(2) beta minus decay
(3) alpha decay
Determine the correct isotopic product after each process has occurred sequentially.