A car travels east with a constant velocity. The magnitude of the acceleration of the car
is
A) decreasing.
B) increasing.
C) constant non-zero.
D) zero.
E) None of the other choices is correct.
Young’s modulus is a(n)
A) strain.
B) stress.
C) breaking strength.
D) elastic modulus.
E) pressure limit.
A charged particle moves and experiences no magnetic force. From this we can
conclude that
A) the particle is moving at right angles to the magnetic field.
B) the particle is moving parallel to the magnetic field.
C) either no magnetic field exists or the particle is moving parallel to the field.
D) no magnetic field exists in that region of space.
E) the particle must be massive.
The mass of 1H is 1.007825 u and the mass of 1n is 1.008665 u. The mass of 12C is
12.000000 u. What is the total binding energy of 12C?
A) 7.7 MeV
B) 92 MeV
C) 0.099 MeV
D) 46 MeV
E) 15 MeV
A terrestrial telescope has focal lengths of 15. mm, 7.5 cm, and 120. cm for eyepiece,
erecting lens, and objective respectively.
(a) What is the magnification of the telescope?
(b) Is this an angular magnification or a lateral size magnification?
(c) What is its length (objective to eyepiece distance)?
In terms of the wavelength of light in soapy water, what is the minimum thickness of
soap film that will reflect a given wavelength of light?
A) one-fourth wavelength
B) one-half wavelength
C) one wavelength
D) two wavelengths
E) there is no minimum thickness
A light ray in air enters water at an angle of incidence of 40. Water has an index of
refraction of 1.33. The angle of refraction in the water is
A) 59.
B) 29.
C) 40.
D) 0.59.
E) 1.33.
Consider a magnifying glass with a power of 3.0 D.
(a) What is the maximum magnification for a person with a near point of 25. cm?
(b) What is the magnification when viewing with a relaxed eye?
The speed of Halley’s comet, while traveling in its elliptical orbit around the sun,
A) decreases as it nears the sun.
B) increases as it nears the sun.
C) is zero at two points in the orbit.
D) is zero at four points in the orbit.
E) is constant.
An object is under the influence of a force as represented by the force vs. position graph
in Fig. 5-7. What is the work done as the object moves from 6 m to 12 m?
A) 20 J
B) 30 J
C) 0 J
D) 40 J
E) 70 J
A layer of insulating material with thermal conductivity K is placed on a layer of
another material of thermal conductivity 2K. The layers have equal thickness. What is
the effective thermal conductivity of the composite sheet?
A) 1.5K
B) 3K
C) K/3
D) 2K/3
E) K/5
Light from a gas discharge tube gives a (an) ________ spectrum.
A) continuous
B) absorption
C) blackbody
D) emission
Two toy cars (16 kg and 2 kg) are released simultaneously on an inclined plane that
makes an angle of 30 with the horizontal. Which statement best describes their
acceleration after being released?
A) The 16-kg car accelerates 8 times faster than the 2-kg car.
B) The 2-kg car accelerates 8 times faster than the 16-kg car.
C) Both cars accelerate at a rate of 8 g.∗
D) Both cars accelerate at a rate of 0.866 g.
E) Both cars accelerate at a rate of g sin(30).
A ball rolls off the edge of a table. The horizontal component of the ball’s velocity
remains constant during its entire trajectory because
A) the ball is not acted upon by any force.
B) the net force acting on the ball is zero.
C) the ball is not acted upon by a force in the vertical direction.
D) the ball is not acted upon by a force in the horizontal direction.
E) None of the other choices is correct.
At a particular instant, a proton moves Eastward in a uniform magnetic field that is
directed straight downward. The magnetic force that acts on it is
A) to the South.
B) zero.
C) directed upward.
D) Northward.
E) Westward.
Which of the following doesn’t have ohm units?
A) ω L
B) ω C
C) R
D) (XcXc)/R
E) (XL – XC)
Unpolarized light is passed through a polarizer-analyzer combination. The transmission
axes of the polarizer and the analyzer are at 30.0 to each other. What percentage of the
unpolarized light gets through the combination?
A) 37.5%
B) 50.0%
C) 63.7%
D) 75.0%
E) 100%
Consider a plane flying with groundspeed Vg and airspeed Va in a wind with velocity V.
Which of the following relationships is true?
A) Vg = Va + V
B) Vg can be less than Va + V
C) Vg can be greater than Va + V
D) Vg can have any value between Va + V and Va – V
E) Vg = Va – V
A camper is about to drink his morning coffee. He pours 400 grams of coffee, initially
at 75.0°C into a 250-g aluminum cup, initially at 16.0°C. What is the equilibrium
temperature of the coffee-cup system, assuming no heat is lost to the surroundings? The
specific heat of aluminum is 900J/(kg∙K). Assume that the specific heat of coffee is the
same as the specific heat of water.
A) 45.5°C
B) 62.0°C
C) 65.0°C
D) 68.0°C
E) 71.0°C
FIGURE 2-7
Refer to Fig. 2-7. If you start from the Bakery, travel to the Cafe, and then to the Art
Gallery, what is the distance you have traveled?
A) 6.5 km
B) 2.5 km
C) 4.0 km
D) 10.5 km
E) 0 km
Consider an RLC circuit that is driven by an AC applied voltage. At resonance,
A) the peak voltage across the resistor is equal to the peak voltage across the inductor.
B) the peak voltage across the capacitor is greater than the peak voltage across the
inductor.
C) the current is in phase with the driving voltage.
D) the peak voltage across the inductor is greater than the peak voltage across the
capacitor.
What is the index of refraction inside a certain transparent material if the critical angle
is found to be 48. (air is outside)?
A) 1.49
B) 1.48
C) 1.35
D) 0.743
E) 1.22
Two children are riding on a merry-go-round. Child A is at a greater distance from the
axis of rotation than child B. Which child has the larger centripetal acceleration?
A) Child A
B) Child B
C) They have the same zero centripetal acceleration.
D) They have the same non-zero centripetal acceleration.
E) There is not enough information given to answer the question.
For constant linear acceleration, the position versus time graph is a
A) horizontal line.
B) vertical line.
C) sloped line.
D) curve.
E) none of the given answers.
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?
A) 24.9 nm
B) 56.7 nm
C) 99.6 nm
D) 199 nm
E) 398 nm
In the periodic table of elements, members of each ________ have similar chemical
properties.
A) period
B) row
C) group
D) transition
A slide projector is designed with its lens 6.0 m from the screen. The projected image is
1.5 m square of a slide object 2.5 cm square.
(a) What is the object distance from the lens?
(b) What should be the lens focal length?
(c) What is the lens POWER?
During a reaction, an element loses 4.8 x 10-28 kg of mass. How much energy (in
Joules) is released?
A) 4.3 x 10-11 J
B) 1.4 x 10-19 J
C) 1.6 x 10-36 J
D) 2.1 x 10-40 J
E) 5.3 x 10-45 J
All of the following are dimensionless except
A) specific gravity.
B) Reynolds number.
C) strain.
D) bulk modulus.
On a calm day (no wind), you can run a 1500-m race at a velocity of 4.0 m/s. If you ran
the same race on a day when you had a constant tailwind of 2.0 m/s, the time it would
take you to finish would be
A) 250 s.
B) 9000 s.
C) 1125 s.
D) 750 s.
E) 500. s.
If the number of turns on the secondary coil of a transformer are less than those on the
primary, the result is a
A) step-down transformer.
B) step-up transformer.
C) 120-V transformer.
D) 220-V transformer.
E) a dc transformer.
Through what potential must an electron be accelerated to observe maximum
diffraction at 70.0 to the surface of a crystal with 0.334 nm between surface planes?
Why do power tools with a plastic case not have a 3-prong plug but metal encased tools
have (or should have) 3-prong plugs?
Is it easier to swing a bat holding the handle at the end, or “choked up”? Why?
What are the first three harmonics of a string of linear mass density 2.00 g/m and length
0.600 m when it is subjected to tension of 50.0 N?
What current flows in a 60. mH inductor when 12. V AC at a frequency of 20. kHz is
applied to it?
The temperature is such that the rms speed of nitrogen molecules is 900. m/s at 750.
mm Hg pressure. If the pressure increases to 780. mm Hg while the temperature
remains constant, what is the rms speed now? [Molecular weight of nitrogen molecule
is 28.]
Consider a velocity with components 36. m/s Westward and 22. m/s Northward. What
is its magnitude and direction?
A converging lens with the same curvature on both sides and focal length 25. cm is to
be made from crown glass (n = 1.52). What radius of curvature is required for each
face?
A heat engine operating between 40°C and 380°C has an efficiency 60% of that of a
Carnot engine operating between the same temperatures. If the engine absorbs heat at a
rate of 60 kW, at what rate does it exhaust heat?
“Absolute Zero” is how many Fahrenheit degrees below freezing (water)?
A spring-driven dart gun propels a 10. g dart. It is cocked by exerting a force of 20. N
over a distance of 5.0 cm. With what speed will the dart leave the gun, assuming the
spring has negligible mass?
If you were a parallel plate capacitor manufacturer, state three ways you might make
larger valued capacitors.
What is the arc length subtended by an angle of 30 on a circle of radius 10 cm?
“Warp one” (the speed of light) is what Mach number at 20.°C?
By how much will mercury rise (or fall) in a 1.0 mm diameter glass tube (contact angle
140., Hg density 13.6 g/cc, surface tension 0.45 N/m)?
How much energy is necessary to place three charges, each of 2.0 μC, at the corners of
an equilateral triangle of side 2.0 cm?