Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
Two violin strings, vibrating at 880. Hz and 876. Hz respectively, will cause a beat
frequency of
A) 4. Hz.
B) 8. Hz.
C) 16. Hz.
D) 878. Hz.
E) 1.76 kHz.
Refer to Fig. 5-8. How fast must the coaster be moving at P in order to coast to a stop at
Q?
A) 9.8 m/s
B) 31 m/s
C) 22 m/s
D) 0.49 Km/s
E) 0.98 Km/s
Light from an object proceeds through 3 lenses, each with magnification 2, -4, 0.2
respectively. The overall magnification is
A) 2 - 4 + 0.2 = -1.8.
B) 2 x (-4) 0.2 = -1.6.
C) 2/(-4)/0.2 = -2.5.
D) +8/5.
E) +5/8.
A submarine rests on the sea bottom. The normal force exerted upon the sub by the
sea-floor is equal to
A) the buoyant force less 1 atmosphere acting on the sub.
B) the weight of the sub plus the weight of the displaced water.
C) the weight of the sub.
D) the weight of the sub less the weight of the displaced water.
E) the weight of the displaced water.
Who suggested that material particles (protons, etc.) have wave properties too?
A) Bohr
B) Einstein
C) Planck
D) Schrodinger
E) de Broglie
FIGURE 12-9
A gas is taken through the cycle illustrated here in Fig. 12-9. During one cycle, how
much work is done by an engine operating on this cycle?
A) 2pV
B) 4pV
C) 3pV
D) pV
E) 5pV
Two very thin lenses, each with focal length 20. cm, are placed in contact. What is the
focal length of this compound lens?
A) 15. cm
B) 10. cm
C) 30. cm
D) 40. cm
E) 20. cm
Lucite has an index of refraction of 1.50. What is its critical angle of incidence?
A) 1.16
B) 15
C) 41.8
D) 65.2
E) 87.4
Which of the following colors undergoes the greatest REFRACTION when passing
from air into glass?
A) yellow
B) red
C) blue
D) orange
E) green
When a car, moving at velocity v, collides head on with a light volley ball, initially at
rest, the ball bounces off with velocity
A) -v.
B) -4v.
C) -1.5v.
D) -2v.
E) -v/2.
By what primary heat transfer mechanism does the sun warm the Earth?
A) convection
B) radiation
C) conduction
D) convection and conduction
A 2.0 kg mass and a 5.0 kg mass are hung on opposite sides of an Atwood's machine,
and released.
(a) What is the tension in the string?
(b) How much time is required to fall 60 cm from rest?
Oxygen molecules are 16 times more massive than hydrogen molecules. At a given
temperature, how do their average molecular speeds compare? The oxygen molecules
are moving
A) 16 times faster.
B) at 1/4 the speed.
C) 4 times faster.
D) the same as the hydrogen molecules.
E) at 1/16 the speed.
An astronaut leaves Earth in a spaceship at a speed of 0.96 c relative to an observer on
Earth. The astronaut's destination is a star system 14.4 light-years away (one light-year
is the distance light travels in one year.) According to the astronaut, how long does the
trip take?
A) 14.4 years
B) 22.7 years
C) 9.34 years
D) 15.0 years
E) 4.20 years
If the frequency of the AC voltage across a capacitor is doubled, the capacitive
reactance of that capacitor
A) decreases to one-fourth its original value.
B) increases to 4 times its original value.
C) decreases to one-half its original value.
D) becomes zero.
E) increases to twice its original value.
A doubly charged ion with velocity 6.0 x 106 m/s moves in a path of radius 30. cm in a
magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?
A) 12.8 x 10-27 kg
B) 16.4 x 10-27 kg
C) 6.68 x 10-27 kg
D) 3.34 x 10-27 kg
E) 8.22 x 10-27 kg
At what frequency does an object with a temperature of 1000 K radiate the most power?
A) 1.0 x 1014 Hz
B) 8.0 x 1014 Hz
C) 2.3 x 1012 Hz
D) 6.7 x 1013 Hz
E) 4.1 x 1011 Hz
What is the magnetic field at the center of a circular loop of wire of radius 4.0 cm when
a current of 2.0 A flows in the wire?
A) 1.3 x 10-6 T
B) 3.1 x 10-6 T
C) 1.3 x 10-6 T
D) 3.1 x 10-6 T
E) 0 T
The current through a 50. Ω resistor is I = 0.80 sin (240. t) amperes.
(a) At what frequency does the current vary?
(b) How much power is dissipated in the resistor?
Three vectors, expressed in Cartesian coordinates, are
The magnitude of the resultant vector is
A) 13.0
B) 7.0
C) 11.1
D) 2.0
E) 5.5
The gamma factor is 1 / and it
A) can be zero.
B) can be a negative number.
C) can be any number greater than or equal to zero.
D) can be any number greater than or equal to one.
E) cannot equal one.
Hans Geiger
A) invented the bubble chamber.
B) discovered radium and polonium.
C) invented the particle detector tube.
D) observed back-scattering from nuclei.
E) discovered radioactivity.
The focal lengths of the objective and eyepiece in a compound microscope are 0.50 cm
and 2.00 cm, respectively. An object is placed at a distance of 0.52 cm from the
objective. If the final image seen by the eye is at a distance of 25 cm from it, what is the
magnification?
A) -125
B) -100
C) -225
D) -325
E) -425
A boy and a girl are riding on a merry-go-round that is turning. The boy is twice as far
as the girl from the merry-go-round's center. If the boy and girl are of equal mass,
which statement is true about the boy's moment of inertia with respect to the axis of
rotation?
A) His moment of inertia is 4 times the girl's.
B) The boy has a greater moment of inertia, but it is impossible to say exactly how
much more.
C) His moment of inertia is twice the girl's.
D) His moment of inertia is half the girl's.
E) The moment of inertia is the same for both.
FIGURE 18-18
In Fig. 18-18, I = 0.65 A and R = 5 Ω. What is the value of the emf E ?
A) 17 V
B) 13 V
C) 3.4 V
D) 6.5 V
E) 25 V
When discharging a battery, the terminal voltage is ________ the battery emf.
A) more than
B) less than
C) equal to
D) zero, as is
If you stand in front of a concave mirror, exactly at its center of curvature,
A) you will see your image and you will appear smaller.
B) you will see your image and you will appear larger.
C) you won't see your image because there is none.
D) you won't see your image because it's focused at a different distance.
E) you will see your image at your same height; however it will be inverted.
A parallel-plate capacitor has plates of area 0.20 m2 separated by a distance of
1.0 mm. What is this capacitor's capacitance?
A) 2.0 102 F
B) 40. F
C) 1.8 nF
D) 0.35 nF
E) 22. μF
How much heat needs to be removed from 100 g of 85°C water to make -5°C ice?
A) 255 cal
B) 168 kcal
C) 8.5 kcal
D) 16.5 kcal
E) 16.8 kcal
When two or more capacitors are connected in parallel to a battery,
A) the voltage across each capacitor is the same.
B) each capacitor carries the same amount of charge.
C) the equivalent capacitance of the combination is less than the capacitance of any one
of the capacitors.
D) all of the given answers
E) none of the given answers
7.0 kg is hung from a steel wire of diameter 0.75 mm and length 2.5 meters.
(S = 8.2 1010 N/m2; Y = 20 1010 N/m2)
(a) By how much does the wire stretch?
(b) If the wire diameter were doubled, what would be the stretch?
Light of wavelength 575 nm falls on a double-slit and the third order bright fringe is
seen at an angle of 6.5. What is the separation between the double slits?
A) 5.0 μm
B) 10 μm
C) 15 μm
D) 20 μm
E) 25 μm
One horsepower is equal to
A) 550. watts.
B) 746. watts.
C) 746. J.
D) 550. J.
E) 550. kW-h.
Which graph(s) in Fig. 2-2 represent(s) constant positive acceleration?
A) graph a
B) graph b
C) graph c
D) graph d
E) both graphs c and d
