The magnetic field near a strong permanent bar magnet might be 500
A) microGauss.
B) Tesla.
C) Gauss.
D) milliGauss.
E) MT.
Spherical lenses suffer from
A) both spherical and chromatic aberration.
B) spherical aberration, but not chromatic aberration.
C) neither spherical nor chromatic aberration.
D) chromatic aberration, but not spherical aberration.
If a solid metal sphere and a hollow metal sphere of equal diameters are each given the
same charge, the electric field ( ) midway between the sphere center and the surface
is
A) greater for the solid sphere than for the hollow sphere.
B) greater for the hollow sphere than for the solid sphere.
C) zero for both.
D) equal in magnitude for both, but one is opposite in direction from the other.
What is the energy of a 633 nm photon?
A) 0.32 eV
B) 3.14 eV
C) 5.1 eV
D) 1.96 eV
E) 0.51 eV
Chromatic aberration occurs because of
A) polarization.
B) spherical surfaces.
C) dispersion.
D) internal reflection.
E) astigmatism.
A cordless phone operates at 900 MHz. What is the associated wavelength?
A) 900 m
B) 0.25 m
C) 300 m
D) 3.3 m
E) 0.33 m
If a 3.0 V potential difference causes a 0.60 A current to flow through a resistor, its
resistance is
A) 1.8 Ω.
B) 15 Ω.
C) 18 Ω.
D) 5.0 Ω.
E) 3.2 Ω.
If the inductance and the capacitance both double in an LRC series circuit, the resonant
frequency of that circuit will
A) decrease to one-half its original value.
B) decrease to one-fourth its original value.
C) decrease to one-eighth its original value.
D) increase to twice its original value.
E) increase to four times its original value.
What is the rotational inertia (moment of inertia) of a 12-kg uniform rod, 0.30 m long,
rotating about an axis perpendicular to the rod and passing through the center of the
rod?
A) 0.27 kg m2
B) 0.18 kg m2
C) 0.090 kg m2
D) 0.54 kg m2
E) 0.36 kg m2
Lisa runs up 4 flights of stairs in 22. seconds. She weighs 510. Newtons. If each flight
rises 310. cm:
(a) What is her change in potential?
(b) What average power (watts) was required during the 22. s?
(c) What minimum horsepower motor would be required to do this?
In music the 3rd harmonic is which overtone?
A) 4th
B) 2nd
C) 1st
D) 3rd
E) 5th
Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3. In order
to obtain equal masses of these two substances, the ratio of the volume of A to the
volume of B will be equal to
A) 1 : 4
B) 4 : 3
C) 3 : 4
D) : 1
E) 1 : 3
At what angle, with the surface, must light strike glass (refractive index 1.6) in order to
completely polarize the reflected ray?
A) 32
B) 86.
C) 34.
D) 11.
E) 56.
The equation of motion of a particle undergoing simple harmonic motion is y = 2.0
sin(0.60t), where y is in cm. At t = 0.60 s determine the particle’s:
(a) displacement.
(b) velocity.
(c) acceleration.
The focal length of the objective of a telescope is 75.0 cm. While the eyepiece has a
focal length of 6.00 cm, what is the magnifying power of this telescope?
A) 0.0800
B) 0.645
C) 450
D) 12.5
E) 200
When the first law of thermodynamics, Q = Δu + W, is applied to an ideal gas that is
taken through an isobaric process,
A) Δu = 0.
B) W = 0.
C) Q = 0.
D) it is not true that Δu = 0 or W = 0 or Q = 0.
A viscous oil flows through a narrow pipe. If the diameter of the pipe were doubled, the
flow rate should increase by what factor?
A) 8
B) 2
C) 4
D) 6
E) 16
The majority of nuclear power plants depend upon which uranium isotope?
A) U-235
B) U-238
C) U-237
D) U-236
E) U-239
The radius of curvature for a plane (flat) mirror is
A) negative.
B) infinite.
C) zero.
D) imaginary.
The kinetic theory of gases suggests the average kinetic energy per molecule is (for a
monatomic gas)
A) 1/2 kT.
B) 5/2 kT.
C) 3/2 kT.
D) 2 kT.
E) kT.
A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the
same direction at 5.00 m/s. The collision is perfectly inelastic.
(a) What is the speed of the auto immediately after the collision?
(b) What percentage kinetic energy did the truck gain in the collision?
A ballerina spins initially at 1.5 revolutions/second when her arms are extended. She
then draws in her arms to her body and her moment of inertia becomes 0.88 kg-m2 and
her angular speed increases to 4.0 rev/s. Determine her initial moment of inertia.
Polonium-215 alpha decays with a half life of 1.8 ms.
(a) How much is left after 1. second?
(b) What is the daughter nucleus?
A 5.5 meter long Aluminum wire has resistance of 0.40 mΩ, ρ = 2.82 x 10-8 Ω ∙ m, α =
4.29 x 10-3 C-1. Its conductivity is
A) 233. Ω ∙ m.
B) 3.55 x 107 Ω-1 m-1.
C) 2.5 x 103 Ω-1 .
D) 2.5 x 103 Ω ∙ m.
E) 2.33 x 107 Ω-1 m-1.
As a helium-filled dirigible rises in the atmosphere, the buoyancy force is expected to
A) increase.
B) remain constant.
C) decrease.
The tensile strength for a certain steel wire is 3000 MN/m2. What is the maximum load
that can be applied to a wire with a diameter of 3.0 mm made of this kind of steel?
A) 64 kN
B) 9.0 kN
C) 42 kN
D) 85 kN
E) 21 kN
When monochromatic X-rays are scattered by a material, the wavelength of the
scattered radiation does not depend upon
A) the scattering angle.
B) mass of the interacting particle.
C) incident wavelength.
D) the type of atom.
By how much will a slab of concrete 18. m long contract when the temperature drops
from 24.°C to -16.°C? (The coefficient of linear thermal expansion for concrete is 12 x
10-6 per degree °C.)
A) 1.5 cm
B) 0.86 cm
C) 70. mm
D) 15. cm
E) 0.5 cm
The frequency in Fig. 13-4
A) is 0.5 Hz.
B) is 1 Hz.
C) is 2 Hz.
D) is 4 Hz.
E) cannot be determined from the given information.
What is the de Broglie wavelength of a ball of mass 200. g moving with a speed of 30.
m/s?
A) 1.1 x 10-34 m
B) 4.5 x 10-28 m
C) 6.67 x 10-28 m
D) 2.2 x 10-34 m
E) 6.67 x 10-31 m
Faraday’s law of induction states that the emf induced in a loop of wire is proportional
to
A) current divided by time.
B) the magnetic flux.
C) the time variation of the magnetic flux.
D) the magnetic flux density times the loop’s area.
A parallel plate capacitor is constructed with Teflon (dielectric constant 2.1) between
the plates. This 12.6 μF capacitor has been charged to 1.5 volts. The Teflon is then
pulled out (removed).
(a) What charge was originally stored?
(b) After removing the Teflon, what potential is across the plates?
Discuss whether a car speedometer measures instantaneous speed or an average speed.
At a depth of about 1030. m in the sea the pressure has increased by 100. atmospheres
(to about 107 N/m2). By how much has 1 m3 of water been compressed by this
pressure? The bulk modulus of water is 2.3 109 N/m2.
Consider the x-axis with 4.0 μC at x = 1.0 meter and -2.0 μC at the origin. Where
should 6.0 μC be placed so that the net force on it is zero?
Why so much emphasis upon units? Why are units considered to be as important as the
quantity, “magnitude”, of something?
A soap bubble has an index of refraction of 1.33. What minimum thickness of this
bubble will ensure maximum reflectance of normally incident 530. nm wavelength
light?
During the investigation of a traffic accident, police find skid marks 90 m long. They
determine the coefficient of friction between the car’s tires and the roadway to be 0.50
for the prevailing conditions. Estimate the speed of the car when the brakes were
applied.
A cyclist does work at the rate of 500. W while riding. With how much average
horizontal force does the wheel push when she is traveling at 10. m/s?
A car is traveling along a highway at 65 mph. Which point in the tires is moving
forward at 65 mph?
Discuss the problems involved in achieving controlled fusion as a source of energy.
A flatbed truck carries a load of steel. Only friction keeps the steel from sliding on the
bed of the truck. The driver finds that the minimum distance in which he can stop from
a speed of 20.0 mi/h without having the steel slide forward into the truck cab is 20.0 m.
What would his minimum stopping distance be when going down a 10.0 incline?
Both the microscope and the telescope make the object appear much larger. Why are
these two instruments designed differently (e.g., why are the equations for
magnification quite different)?
Given 3 capacitors: 4.00 μF, 7.00 μF, and 9.00 μF; what is the equivalent capacity if
they are connected in parallel?
A car and a truck are traveling in the same direction along a straight section of highway.
The car is moving at 55. mph and the truck is moving 45. mph. What is the velocity of
the car relative to the truck?
The moon causes a tidal bulge on the Earth, and the lunar pull on the bulge slows the
rotation velocity of the Earth. Where does the lost angular momentum go?
At what speed are lengths contracted to half and times dilated by a factor of 2?
Consider a car with its wheels rolling (not sliding) on the road. How fast must the auto
move for some point on a wheel to reach the speed of sound? Explain.