Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
The electric field between the plates of a parallel plate capacitor is inversely
proportional to the plate separation.
The index of refraction for a given material is directly proportional to the frequency of
light.
A force can be exerted on an object and yet do no work.
The net force on an object in orbit is zero.
When resistors are connected in parallel to a source of emf, the current through each
resistor is the same.
For total internal reflection to take place, light must go from a medium of lower index
of refraction to a medium of higher index of refraction.
Radiative heat transfer requires a fluid to mediate the energy transfer.
The de Broglie wavelength is inversely proportional to the momentum of the particle.
The capacitance of a parallel plate capacitor is directly proportional to its plate
separation.
The focal length of the objective of a telescope is much longer than the focal length of
the eyepiece.
Electric charge is quantized.
A Carnot cycle requires an ideal gas for its "working substance."
In a vacuum, all electromagnetic waves travel at the same speed.
Bats use infrasound to navigate.
A projectile is launched from ground level with a certain speed. For any range less than
the maximum range there are two possible launch angles that give the same range.
The coulomb, which is the unit of charge, is the charge on one electron.
When a rigid body rotates about a fixed axis all the points in the body have the same
angular displacement.
When a rigid body rotates about a fixed axis all the points in the body have the same
tangential acceleration.
Kinetic energy is proportional to speed.
The constant K in Kepler's Third Law is the same for all the planets in our solar system,
but is different for planetary systems orbiting other stars.
The horizontal component of the velocity of a projectile remains constant during the
entire trajectory of the projectile.
The perpendicular-axis theorem can be applied to any object.
In a nearsighted person the eye makes the light coming into it converge too rapidly.
The wavelength of light is important for thin film interference to occur within the film
itself.
The electromotive force of a battery is the maximum potential difference between the
terminals of the battery.
If a force is directed perpendicular to the displacement, no work is done by that force.
If the net work W is done on an object is positive, the object's kinetic energy increases
by an amount W.
Equipotential surfaces are always at right angles to the electric field.
A blackbody is a perfect emitter of the radiation it generates.
An ac signal of a certain frequency is applied to a capacitor. The current leads the
voltage by 90.
Zeros between non-zero numbers are significant.
A positive charge placed in an electric field experiences a force in the direction of the
field.
The reflection of light from a rough surface is called specular reflection.
Infrasound carries over long distances better than ultrasound.
Unbalanced torques produce rotational accelerations, and balanced torques produce
rotational equilibrium.
When a rigid body rotates about a fixed axis all the points in the body have the same
angular speed.
Consider an ideal gas at 1.0 atmosphere in a closed container. If the temperature
changes from 300. K to 450. K, the final gauge pressure will be
A) 0.5 atm.
B) 4.5 atm.
C) 1.5 atm.
D) 3.0 atm.
E) 21. psi.
Electric power is transmitted over long distances at high voltage because
A) electricity moves faster at higher voltage.
B) the lines can be on taller poles.
C) lightning does more damage.
D) there is less power lost.
E) electricity moves slower at higher voltage.
What is the energy of a photon of wavelength 3 cm?
A) 82 eV
B) 4.1 x 10-5 eV
C) 41 eV
D) 4.1 x 10-5 J
E) 3 ergs
If two light waves are coherent, which of the following is NOT necessary?
A) They must have the same frequency.
B) They must have the same wavelength.
C) They must have the same amplitude.
D) They must have the same velocity.
E) They must have a constant phase difference at every point in space.
FIGURE 13-3
Shown in Fig. 13-3 is a graph of position vs. time for a system undergoing simple
harmonic motion. Which of the other graphs represents the system's velocity as a
function of time?
A) graph a
B) graph b
C) graph c
D) graph d
What is the critical angle for light traveling from crown glass (n = 1.52) into water (n =
1.33)?
A) 42
B) 48
C) 53
D) 57
E) 61
A charge of 2.0 μC flows onto the plates of a capacitor when it is connected to a
12. V battery. How much work was done in charging this capacitor?
A) 24. μJ
B) 12. μJ
C) 48. μJ
D) 0.14 mJ
E) 21. μJ
A 10.0-kg rod has a Varying linear density that is symmetric about the midpoint of the
rod. The moment of inertia about an axis perpendicular to the rod that passes through
the rod 30.0 cm from its midpoint is 5.00 kg∙m2. What is the moment of inertia about
an axis perpendicular to the rod that passes through the rod 20.0 cm from its midpoint?
A) 7.50 kg∙m2
B) 4.50 kg∙m2
C) 5.10 kg∙m2
D) 4.90 kg∙m2
E) Answer depends on whether the new axis is on the same side of the midpoint as the
30.0 cm distant axis or if its on the opposite side of the midpoint.
A confined gas has an average energy/molecule of 60. meV. If the pressure is tripled
and the volume is reduced by a factor of 3, what now is the average energy?
A) 0.18 eV
B) 0.10 eV
C) 0.06 eV
D) 0.02 eV
E) 0.03 eV
Consider a converging lens. If the object is inside the focal point, then the image will
always be
A) real.
B) virtual.
C) at the focal point.
D) at infinity.
The Earth cannot contain a giant permanent magnet because
A) the Earth doesn't have enough iron.
B) the core would repel it.
C) the Earth isn't large enough.
D) ferromagnetism disappears at high temperature.
E) its magnetic field is too large.
The neutrino has
A) enormous rest mass, positive charge, and spin quantum number 1/2.
B) negligible rest mass, negative charge, and spin quantum number 1.
C) negligible rest mass, no charge, and spin quantum number 1/2.
D) moderate rest mass, positive charge, and no spin.
An object is placed 15. cm from a concave mirror of focal length 20. cm. If the object is
4.0 cm tall,
(a) where is the image formed?
(b) how tall is it?
FIGURE 12-5
The process shown on the p-V graph in Fig. 12-5 is an
A) isobaric expansion.
B) isometric expansion.
C) isothermal expansion.
D) adiabatic expansion.
Suppose you hear a car approaching and its horn is heard as a 3037. Hz tone. After
passing, you hear 2430. Hz.
(a) What was the Mach number of the car?
(b) What is the speed of sound if the outside temperature is 19.°C?
(c) How fast was the car moving, in meters per second?
If a nucleus had a diameter of 8.0 10-15 m, what would its mass be in atomic mass
units?
A) 7
B) 296
C) 37
D) 64
E) 128
An object is placed 10 cm from a convex lens of focal length 20 cm. What is the
magnification?
A) 0.50
B) 1.0
C) 1.5
D) 2.0
E) 2.5
What is the angular speed of a record that rotates at 33-1/3 rpm?
A) 1.74 rad/s
B) 33.3π rad/s
C) 33.3/π rad/s
D) 3.49 rad/s
E) 2.77 rad/s
A refrigerator has a COP of 2.5. If it removes 7.7 MJ of heat in 25. minutes,
(a) what is the minimum power motor to operate the refrigerator?
(b) what is its efficiency if it were a reversible engine?
What is the minimum energy needed to lift 1.0 kg to a height of 200. km and to give it a
speed of 8.0 km/s? (Neglect the small decrease of "g" over that distance.)
A) 34. TJ
B) 34. kJ
C) 34. MJ
D) 34. GJ
E) 34. J
Two deuterium nuclei, H, fuse to produce a helium nucleus, He, and a neutron. A
neutral deuterium atom has a mass of 2.014102 u; a neutral helium atom has a mass of
3.016030 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of
1.008665 u; and a proton has a mass of 1.007277 u. How much energy is released in the
process? 1 u = 931.494 MeV/c2.
A) 3.27 MeV
B) 3.57 MeV
C) 4.00 MeV
D) 4.50 MeV
E) 6.58 MeV
Assuming the Earth's orbital angular momentum is quantized, estimate its angular
momentum quantum number (l).
A) 3 x 1074
B) 3 x 1044
C) 3 x 1024
D) 3 x 10-34
E) 3 x 10-44
The heat required to change a substance from the liquid to the vapor state is referred to
as the
A) heat of fusion.
B) heat of vaporization.
C) heat of evaporation.
D) heat of condensation.
If you double the thickness of a wall built from a homogeneous material, the rate of
heat loss for a given temperature difference across the thickness will
A) become one-half its original value.
B) also double.
C) become one-fourth its original value.
D) become one-eighth its original value.
The natural frequencies for a stretched string of length L, and wave speed v, are Nv/
(2L) where N equals
A) 0, 1, 2, 3, ...
B) 2, 4, 6, 8, ...
C) 1, 2, 3, 4, ...
D) 0, 1, 3, 5, ...
E) 1, 3, 4, 5, ...
A vector has componentsAy = 12 m andAy = 5.0 m. What is the magnitude of vector
?
A) 7.0 m
B) 13 m
C) 17 m
D) 21 m
E) 60 m
The type of detector that uses liquid hydrogen is a
A) Geiger tube.
B) spark chamber.
C) scintillation counter.
D) cloud chamber.
E) bubble chamber.
A 5.0 μF and a 7.0 μF capacitor are connected in series across an 8.0-V DC source.
What is the voltage across the 5.0 μF capacitor?
A) 0 V
B) 8.0 V
C) 2.7 V
D) 3.6 V
E) 4.7 V
Two coherent sound waves will destructively interfere when the path difference is the
wavelength times what?
A) half an even integer
B) an integer
C) half an odd integer
D) an odd integer
A spring has 0.770 kg oscillating on it with a period of 1.25 seconds.
(a) What is the frequency?
(b) Determine the spring constant.
(c) If the mass is doubled and the spring made 3 times stiffer, what is the new period?
The resistance of a 100-cm wire of cross sectional area 2 x 10-6 m2 is 400 Ω. What is
the resistivity of the material of this wire?
A) 0.8 x 10-4 Ωm
B) 8 x 10-4 Ωm
C) 0.8 x 10-5 Ωm
D) 0.8 x 10-6 Ωm
E) 8 x 10-6 Ωm
An object is thrown upwards with a speed of 14 .0 m/s. How long does it take it to
reach its maximum height?
A) 1.22 s
B) 1.43 s
C) 2.86 s
D) 3.14 s
E) 4.15 s
A 150. μA full scale galvanometer is used as a 1.00 A full scale ammeter when shunted
by 3.3 mΩ. What is the coil resistance of the galvanometer?
The normal U.S. average annual radiation dose per person is about how many REM?
FIGURE 15-6
Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. Each
is attached to an identical string and suspended from the same point, as shown in Fig.
15-6. They repel each other and hang with separation 50.0 cm. The length of the string
from the point of support to the center of a ball is 250. cm. Determine the charge on
each ball.
Many Earth-based telescopes are larger than the Hubble Space Telescope, so what
justifies the great expense of a "space-based" instrument?
If a floating log is seen to bob up and down 15. times in a minute as waves pass by you,
what is the frequency and period of the wave?
Suppose that in an examination of a spinal injury it is found that the spinal fluid (with
about the same density as water) will rise a vertical height of 13. cm in an open tube.
What pressure does this correspond to, expressed in mm of mercury and in
atmospheres?
If you find yourself in a locality where the magnetic declination is "15. East," in which
direction is true North in relation to a compass needle?
A coil of 40. turns and cross-sectional area 12. cm2 is oriented perpendicular to a
magnetic field, which varies from zero to 1.2 T in 0.02 s. What emf is induced in the
coil?
A load of steel of mass 6000 kg rests on the flatbed of a truck. It is held in place by
metal brackets that can exert a maximum horizontal force of 8000 N. When the truck is
traveling 20.0 m/s, what is the minimum stopping distance if the load is not to slide
forward into the cab?
Sort these materials in order of increasing dielectric constant: paper, vacuum, air.
Give examples of four quantities which are scalars.
How would you "weigh" the astronauts in orbit (where they feel weightless) so that you
can keep them in good health?
A man 190. cm tall stands 25. m from a plane wall mirror. One meter in front of him
sits his dog, 30. cm tall. What minimum mirror size is needed for the man to see all of
his dog's reflection?
Given 30. μH and a 60. Ω resistor, what range of capacity allows tuning this series
circuit to the FM band (88-108 MHz)?
Find the energy in MeV released in the reaction:
U → Th + He
Mass of 238U = 238.050786 u
Mass of 234Th = 234.043583 u
Mass of 4He = 4.002603 u
Neglecting the effect of air friction, at what angle should a cannon be raised to achieve
the greatest RANGE (horizontal distance)?
Describe mechanical efficiency.
How much energy is required to remove one proton from 9Be?
