If the Q-value is greater than zero for a nuclear reaction, the reaction is
A) exoergic
B) endoergic
C) endothermic
D) exdoergic
E) not possible
A sound source approaches a stationary observer. The frequency heard by the observer
is
A) higher than the source.
B) lower than the source.
C) the same as that of the source.
D) equal to zero.
E) impossible to predict.
Consider a mass initially moving at 7.50 m/s.
(a) How long does it take to move 3.5 km if it accelerates at 0.550 m/s2?
(b) How fast is it moving after this acceleration?
What do you buy from the “power” company?
A) potential
B) power
C) current
D) energy
E) voltage
A spaceship leaves Earth at 70.0% the speed of light. How fast must the spacecraft
launch a shuttlecraft with respect to the ship so that it appears, from Earth, to be moving
98.7% the speed of light away.
A) 0.928c
B) 0.966c
C) 0.987c
D) 0.972c
E) 0.911c
You fall, while skiing, and one ski (of weight W) loosens and slides down an icy slope
(assume no friction), which makes an angle θ with the horizontal. The force that pushes
it down along the hill is
A) W.
B) W cos θ.
C) zero; it moves with constant velocity.
D) W sin θ.
E) W tan θ.
A very long solenoid has 1.0 x 106 turns per meter and a cross-sectional area of 2.0 x
106 m2. A short, secondary coil with 1.0 x 103 turns is wound over the solenoid’s
midpoint. What emf is induced in the secondary coil if the current in the solenoid is
changing at a rate of 4.0 A/s?
A) 1.0 V
B) 2.7 V
C) 1.6 V
D) 0.52 V
E) 4.4 V
How much energy would be released if 2.0 kg of material was lost during a reaction?
A) 1.8 x 1017 J
B) 1.5 x 1016 J
C) 2.4 x 10-17 J
D) 6.0 x 108 J
E) 4.7 x 10-8 J
FIGURE 15-1
A point charge of +Q is placed at the centroid of an equilateral triangle, as shown in
Fig. 15-1. When a second charge of +Q is placed at one of the triangle’s vertices, an
electrostatic force of 4 N acts on it.
What is the magnitude of the force that acts on the center charge when a third charge of
+Q is placed at one of the other vertices?
A) zero
B) 2 N
C) 4 N
D) 8 N
E) 16 N
A shear force of 400 N is applied to one face of an aluminum cube with sides of 30 cm.
What is the resulting relative displacement? (The shear modulus for aluminum is 2.5 x
1010 N/m2)
A) 1.9 x 10-8 m
B) 2.6 x 10-8 m
C) 4.4 x 10-8 m
D) 5.3 x 10-8 m
E) 8.2 x 10-8 m
The binding energy per nucleon
A) decreases steadily as we go to heavier elements.
B) increases steadily as we go to heavier elements.
C) is approximately constant throughout the periodic table, except for very light nuclei.
D) has a minimum near iron in the periodic table.
A flashlight draws 0.133 A from a 3.0 volt battery pack. In 2.0 minutes:
(a) how much charge flows from the battery?
(b) how much energy was supplied by the battery?
(c) how many electrons passed any point in the circuit every second?
A child’s toy is suspended from the ceiling by means of a string. The Earth pulls
downward on the toy with its weight force of 8 N. If this is the “action force,” what is
the “reaction force”?
A) the string pulling downward on the ceiling with an 8-N force
B) the ceiling pulling upward on the string with an 8-N force
C) the string pulling upward on the toy with an 8-N force
D) the toy pulling upward on the Earth with an 8-N force
E) the toy pushing downward on the Earth with an 8-N force
Kepler’s 3rd law says T2 /r3 = K. What does the constant K depend upon?
A) period
B) frequency
C) size
D) mass
E) temperature
For all transparent material substances, the index of refraction
A) is less than 1.
B) is greater than 1.
C) is equal to 1.
D) is less than or equal to 1.
E) is greater than or equal to 1.
What is the Q value for the following reaction?
7Li + 1p = 4He + 4He
(7.016005) (1.007825) (4.002603) (4.002603)
A) 13.35 MeV
B) 13.57 MeV
C) 15.37 MeV
D) 17.35 MeV
E) 17.53 MeV
Consider a uniform electric field of 50. N/C directed toward the East. If the voltage
measured relative to ground at a given point in the field is 80. V, what is the voltage at a
point 1.0 m directly East of the point?
A) 15. V
B) 30. V
C) 0.15 kV
D) 30. kV
E) impossible to calculate from the information given
A 2.3 cm tall statue is 15. cm in front of a convex mirror. The mirror radius of curvature
is 18. cm.
(a) Is the image real or virtual?
(b) How far is the image from the mirror?
(c) Is the image upright or inverted?
(d) How high is the image?
When the index of refraction of a transparent material varies with wavelength, the
material exhibits
A) density variation.
B) polarization.
C) dispersion.
D) reflection.
E) total internal reflection.
If the refractive index of the glass in a lens varies with wavelength, then which of the
following results?
A) spherical aberration
B) light scattering
C) total reflection
D) astigmatism
E) chromatic aberration
A vector has componentsAx> 0, andAy < 0, the angle that this vector makes with the
positive x-axis must be in the range
A) 0 to 90.
B) 90 to 180.
C) 180 to 270.
D) 270 to 360.
Suppose a bug spatters upon your windshield as you drive down the road. Which
sustains the greater change of momentum?
A) insufficient information
B) the bug
C) both the same
D) the car
In a nuclear reaction, what value is conserved in addition to electric charge, energy, and
momentum?
A) atomic number
B) neutron number
C) nucleon number
D) all of the given answers
E) none of the given answers
What is the power output of a hot air furnace that produces heat at the rate of 160,000.
BTU/hr?
A) 22 kW
B) 80 kW
C) 47 kW
D) 7.6 kW
E) 1.6 kW
A mass spectrometer needs
A) colinear magnetic and electric fields.
B) perpendicular magnetic and electric fields.
C) only a magnetic field.
D) only an electric field.
E) a perpendicular gravitational field.
What is the rms speed of a helium atom:
(a) at 5. K?
(b) at -196.°C (the boiling point of N2)?
(c) at 100.°C?
How long does it take for a rotating object to speed up from 15.0 to 33.3 rad/s if it has
an angular acceleration of 3.45 rad/s2?
A) 4.35 s
B) 5.30 s
C) 9.57 s
D) 10.6 s
E) 63.1 s
Consider two copper wires. One has twice the length and twice the cross-sectional area
of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance.
B) The longer wire has twice the resistance of the shorter wire.
C) The longer wire has four times the resistance of the shorter wire.
D) The shorter wire has four times the resistance of the longer wire.
E) The shorter wire has twice the resistance of the longer wire.
A light beam with wavelength 440. nm in a material then enters air and its wavelength
becomes 577. nm.
(a) What is the index of refraction for the material?
(b) At what angle with the surface will the beam be totally reflected back in the
material?
Refer to Fig. 5-4. What is the amount of work done by the force F3 as the object moves
up the inclined plane?
A) 12.0 J
B) 16.0 J
C) 20.8 J
D) 0 J
E) 24.0 J
A race car, traveling at a constant speed of 50. m/s, drives around a circular track of
radius 250. m. What magnitude acceleration does it experience?
A) 1.0 m/s2
B) zero
C) 10. m/s2
D) 0.63 km/s2
E) 2.2 m/s2
Mixing pigments is an example of the ________ method of color production.
A) complementary
B) subtractive
C) additive
D) composite
E) “tri-color”
When a photon is scattered from an electron, there will be an increase in the photon’s
A) energy.
B) frequency.
C) wavelength.
D) momentum.
E) speed.
The experiments of what person first clearly demonstrated the wave nature of light?
A) Maxwell
B) Galileo
C) Newton
D) Young
E) Einstein
FIGURE 8-5
A solid disk with diameter 2.00 meters and mass 4.0 kg freely rotates about a vertical
axis at 36. rpm. A 0.50 kg hunk of bubblegum is dropped onto the disk and sticks to the
disk at a distance d = 80. cm from the axis of rotation, as shown in Fig. 8-5.
(a) What was the moment of inertia before the gum fell?
(b) What was the moment of inertia after the gum stuck?
(c) What is the angular velocity after the gum fell onto the disk?
Two spaceships are traveling through space at velocities of 0.600c and 0.900c,
respectively, with respect to Earth. If they are headed directly toward each other, what is
their approach velocity, as measured by the captain of either ship?
Consider a heavy object which is thrown straight up, reaches its highest point, and then
falls back down to the ground. During what parts of the trajectory was it in “FREE
FALL”? (assume here that air friction is negligible)
What was it that the Compton effect illustrated?
How many joules of energy are used by a 2.0 hp motor that runs for 1.0 hr?
State Pascal’s Principle.
A marble rolls off the edge of a table top with a speed of 2.0 m/s. What is the magnitude
of its velocity 0.10 s later?
When referring to the “cgs” system, what does the “c”, the “g”, and the “s” stand for?
Consider a bicycle wheel to be a ring of radius 30. cm and mass 1.5 kg. Neglect the
mass of the axle and sprocket. If a force of 20. N is applied tangentially to a sprocket of
radius 4.0 cm for 4.0 s, what linear speed does the wheel achieve, assuming it rolls
without slipping?
A cubic box has sides of length 8.0 cm. What is the maximum number of pulverized
spherical balls of diameter 1.5 cm that can fit inside the closed box (Vsphere = 4/3 πr3)?
Water flows over a waterfall 20. m high, at the rate of 4.0 104 kg/s. If this water powers
an electric generator with a 40% efficiency, how many watts of electric power can be
supplied?
A sports car of mass 1000 kg can accelerate from rest to 72. km/h in 6.6 s. What would
the average force of the car’s engine be?
A car is traveling along a highway at 65 mph. What is the linear speed of the bottom of
the tires?
State Kirchhoff’s loop theorem.
For what slit separation will no 1st order double-slit-fringe appear for 550. nm light?
A 14. Coulomb charge is moving straight toward you at 4800. m/s. When it is 70.
meters away from you, what is the magnitude of the magnetic field it produces at
YOUR location?