Version 4                                  April 28 1999

COMPREHENSIVE SCIENCES DEPARTMENT
PHYSICAL SCIENCES
 FINAL EXAMINATION

ID #: _____________                                 SECTION: _____________

MULTIPLE CHOICE

Select the letter of the choice that BEST answers the question:

1.       If the temperature of a gas is increased, its volume is
a. reduced by half
b. reduced by one-fourth
c. doubled
d. constantly decreasing

2.       The acceleration of an object moving at constant velocity is
a. uniform
b. zero
c. constantly increasing
d. constantly decreasing

3.       Acceleration is the rate of change of
a. position
b. velocity
c. force
d. energy

4.       The only one of the following that possesses kinetic energy is
a. compressed air
b. wind
c. a would-up clock spring
d. a tank of gasoline

5.       Microwave ovens emit a frequency intended to be in resonance with which of the following?
a. frequency of water molecules
b. size of oven compartment
c. frequency of metal lining of oven
d. frequency of food molecules

6.       If a gallon of gasoline costs $1.25, how much would a liter cost?
a. $0.33
b. $4.72
c. $3.50
d. $0.47

7.       The number of wave crests passing a given point per second is called
a. frequency
b. velocity
c. direction
d. time

8.       In addition to magnitude, a vector quantity has
a. speed
b. velocity
c. direction
d. time

9.       Energy is measured in the same units as
a. power
b. speed
c. acceleration
d. work

10.     A sound wave with a speed of 334 m/s and a wavelength of 3.0 m has a frequency of
a. 1000 Hz
b. 337 Hz
c. 111 Hz
d. 1/111 Hz

11.     Heat is usually transferred from the cooler part of the system to warmer material by
a. a stove as it heats up
b. a refrigerator that is running
c. an electric fan that is running
d. none of the above

12.     An acceleration can result from
a. a change in speed
b. a change in direction
c. changes in both speed and direction
d. all of the above

13.     For an object in free fall
a. the velocity nearly doubles each second
b. the speed increases nearly 10 m/s for each second it is falling
c. the average velocity is 1 m/s for each second
d. the velocity is 100 m/s

14.     Sound waves are not transmitted by
a. solids
b. liquids
c. gases
d. a vacuum

15.     The force of gravity
a. does not depend on the masses
b. acts only between large masses
c. is inversely proportional to the square of the separation distance
d. is always one of repulsion

16.     Pitch corresponds to
a. frequency
b. speed
c. amplitude noise
d. noise

17.     A basic aim of science is to
a. invent labor-saving devices
b. make nature less mystifying
c. eradicate war
d. create new and improved products

18.    The number of grams in 1.50 pounds of matter is
a. 681 grams
b. 844 grams
c. 225 grams
d. 727 grams

19.     As a spaceship nears the moon, its mass
a. remains unchanged
b. varies with distance
c. increases slightly
d. decreases slightly

20.     The current in a 60-watt, 120-volt lamp is
a. amp
b. 2 amps
c. 90 amps
d. 7200 amps

21.    The ion Mg2+ has the same electronic configuration as
a. Ar
b. Na
c. F
d. Ne

22.    How many kg are there in 1 mg?
a. 1 x 10-6 kg
b. 1 x 10-3 kg
c. 1000 kg
d. 1 x 106 kg

23.    When your car travels around a sharp curve, you are flung sideways because
a. you tend to continue moving in a straight line
b. a centrifugal force is acting on you
c. the car exerts an outward force on you
d. of gravity

24.    Of the qualities below, perhaps the most important for a career in science is
a. a curiosity about nature
b. the enjoyment of performing scientific experiments
c. a fondness for mathematics
d. the love of truth

25.    The acceleration due to gravity on the surface of planet X is three times that on the earth.   What mass would an object have on planet X if its mass is 5.0 kg on earth?
a. 5.0 kg
b. 15 kg
c. 45 kg
d. 135 kg

26.    Which of the following units is the longest?
a. a foot
b. a yard
c. a meter
d. a centimeter

27.    The basic unit of volume in the metric system is the
a. liter
b. centimeter
c. quart
d. kg3

28.    A change in motion
a. is produced only by a contact force
b. can occur only if the acceleration is zero
c. requires a balanced force
d. is evidence of an unbalanced force

29.    The velocity of sound in air is a function of
a. wavelength
b. frequency
c. temperature
d. amplitude

30.    Which of the following is not true of waves in general?
a. they transport energy
b. they travel outward from the source
c. they travel over much greater distances than do the molecules of the medium of travel
d. they carry matter with them

31.    Which type of heating causes sunburn?
a. conduction
b. convection
c. radiation
d. all of the above

32.    The law of force is another name for Newton's
a. first law
b. second law
c. third law
d. centripetal force

33.    The fact that matter possesses a property called inertia means that
a. matter resists a change in its state of motion
b. all matter attracts other matter
c. matter is hard
d. matter is chemically inert

34.    The number 0.00063 written in scientific notation is
a. 63 x 10-4
b. 63 x 103
c. 6.3 x 10-4
d. 6.3 x 10-3

35.    The operation of a refrigerator resembles the physics of
a. the melting of ice
b. the freezing of water
c. a heat engine
d. the evaporation of water

36.    If we know the magnitude and direction of the net force acting on a body of given mass, Newton's second law allows us to calculate its
a. position
b. velocity
c. acceleration
d. speed

37.    Which one of the following prefixes denotes 1/1000 of a basic unit?
a. kilo
b. milli
c. deci
d. centi

38.    The oscillations are parallel to the wave motion in
a. light waves
b. water waves
c. sound waves
d. all waves

39.    When the efficiency of a machine is increased
a. the work input in increased
b. the work output increases
c. the total energy is conserved
d. perpetual motion occurs

40.    The basic SI system units for length, mass, and time are
a. foot, pound, second
b. foot, kilogram, second
c. meter, minute, kilogram
d. meter, kilogram, second

41.    The possible values for the magnetic quantum number of a 3p electron are
a. 0, 1, 2
b. 1, 2, 3
c. -1, 0, 1
d. -2, -1, 0, 1, 2

42.    A body at rest may have
a. speed
b. momentum
c. energy
d. velocity

43.    What two quantities, along with mass, make up the three basic quantities used to derive additional quantities?
a. length and force
b. power and force
c. length and time
d. force and time

44.    A scientific model
a. is a representation of ultimate reality
b. is a useful conceptual tool
c. must be changed annually
d. is constructed of sticks and balls

45.    Scientists are involved in applying the "scientific method" when
a. they select any procedure which appears appropriate to solve a problem
b. they follow a well-defined, step-wise procedure
c. they ignore theories and concentrate upon experiments
d. they work in a laboratory

46.    Motion is a process of a change in
a. time
b. mass
c. weight
d. position

47.    Isotopes of an element
a. have different numbers of protons
b. show very similar chemical properties
c. have the same mass number
d. have the same number of neutrons

48.    The temperature of a substance remains constant while it experiences an inward heat flow. Which of the following best describes the substance?
a. gas
b. liquid
c. solid
d. substance undergoing a change of state

49.    The force required to maintain an object at constant velocity (neglecting friction) is equal to
a. the mass of the object
b. the weight of the object
c. zero
d. centrifugal

50.    Normal body temperature is taken as 98.6oF. What is this in Celsius?
a. 66.6 oC
b. 37.0 oC
c. 22.8 oC
d. 54.8 oC

51.    A book appears blue in sunlight because the blue light is
a. diffracted
b. reflected
c. absorbed
d. transmitted

52.    What is 12,000 times 6,000,000?
a. 7.2 x 108
b. 7.2 x 109
c. 7.2 x 1010
d. 7.2 x 1012

53.    A radio wave has a speed of 3 x 108 m/s and a frequency of 101 MHz. What is its wavelength?
a. 3.0 m
b. 45 m
c. 0.10 m
d. 2.97 m

54.    The tendency of an object to resist a change in motion is measured by its
a. speed
b. velocity
c. mass
d. acceleration

55.    a red rose
a. absorbs red light
b. refracts red light
c. absorbs all colors but red
d. reflects all colors

56.    Work depends on a. force and distance
b. force and energy
c. distance and momentum
d. energy and momentum

57.    A bicycle starts from rest and reaches 6.0 m/s afer 5.0 seconds. What is its acceleration?
a. 6.0 m/s2
b. 3.0 m/s2
c. 2.4 m/s2
d. 1.2 m/s2

58.    Compared to a soft sound, the speed of a loud sound is
a. less
b. greater
c. the same
d. variable

59.    The color of light depends on its
a. amplitude
b. intensity
c. wavelength
d. velocity

60.    The notation "4d" means
a. n=3, l=4
b. n=4, l=3
c. n=4, ml=3
d. n=4, l=5

61.    Electrical conductors are materials
a. that have an excess of electrons
b. that have a deficiency of electrons
c. that repel electrons
d. in which electrons move freely

62.    The volume of a gas is directly proportional to its
a. pressure
b. Kelvin temperature
c. Celsius temperature
d. Fahrenheit temperature

63.    What property of atoms determines whether or not different elements have similar chemical properties?
a. mass of the atom
b. number of protons
c. number of outer shell electrons
d. number of neutrons

64.    Which of the following situations involves potential energy primarily?
a. a stretched rubber band
b. a swing at its lowest point
c. a hammer as it strikes a nail
d. a bird in flight

65.    Amplitude corresponds to
a. frequency
b. noise
c. loudness
d. velocity

66.    A traveling wave train has a wavelength of 0.50 m and a speed of 20 m/s.  What is the wave frequency?
a. 0.025 Hz
b. 20 Hz
c. 40 Hz
d. 10 Hz

67.    An object moving in a circular path is accelerating because it is undergoing a change in its
a. speed
b. displacement
c. direction
d. mass

68.    Which one of the following would you expect to be the best thermal conductor?
a. air
b. water
c. aluminum
d. concrete

69.    If an oscillation has a frequency of 1 Hz, it has a period of
a. s
b. 1 s
c. 2 s
d. 10 s

70.    In order to keep its food hot, a restaurant will place it under which type of lamp?
a. infrared
b. visible light
c. ultraviolet
d. gamma ray

71.    The rate at which work is done is equivalent to
a. thermal energy
b. potential energy
c. kinetic energy
d. power

72.    Power
a. is work times time
b. has units of joules
c. is the time rate of doing work
d. is the same for all motors

73.    The alpha radiation first detected by Becquerel consisted of
a. electrons
b. helium nuclei
c. high energy quanta
d. protons

74.    The fact that an object resists a change in motion is called
a. inertia
b. gravity
c. centrifugal force
d. weight

75.    Power is
a. work times time
b. the rate of doing work
c. expressed in joules
d. the same for all motors

76.    Forced air home heating is an example of heat transfer by
a. radiation
b. conduction
c. convection
d. radiation

77.    Newton's third law is a statement of the law of
a. gravitation
b. action-reaction
c. inertia
d. force

78.    An object that reflects all colors equally when illuminated by sunlight appears to be
a. red
b. yellow
c. black
d. white

79.    A temperature of 77 oF is what temperature in Celsius?
a. 15 oC
b. 25 oC
c. 43 oC
d. 298 oC

80.    The mass of a body is
a. how heavy it is
b. a measure of its inertia
c. dependent on gravitational pull
d. different on the moon than on earth

81.    A sprinter runs the 100-m dash in 9.8 seconds. What is the average speed?
a. 9.8 m/s
b. 10.2 m/s
c. 19.6 m/s
d. 20.4 m/s

82.    The law of conservation of energy states that energy cannot be
a. wasted
b. transformed
c. created or destroyed
d. changed to a more useful form

83.    If the highway speed limit of 55 mi/h were changed to metric units of km/hr, the posted limit would probably be
a. 55 km/h
b. 75 km/h
c. 90 km/h
d. 100 km/h

84.    A net force is acting on a body, therefore, the body is
a. at rest
b. losing mass
c. moving with a constant velocity
d. being accelerated

85.    Work is don
a. by any applied force
b. by all components of a force
c. by an applied force perpendicular to the direction of motion
d. when a force moves an object

86.    Acceleration refers to
a. how fast an object is moving
b. how fast an object can move in a certain time
c. how much the speed changes
d. how fast the speed is changing

87.    An atom with 74 protons, 109 neutrons, and 74 electrons has a mass number of
a. 74
b. 109
c. 148
d. 183

88.    A heat engine is most efficient if the working parts
a. and the exhaust system are both hot
b. are cool and the exhaust is hot
c. are hot and the exhaust is cool
d. and the exhaust are both cool

89.    The efficiency of a heat engine can be 100 percent only if its exhaust temperature is
a. 0 oC
b. 0 K
c. less that its input temperature
d. equal to its input temperature

90.    The ground state electronic configuration for silicon (Z=14) is
a. 1s2 2s2 2p6 2d4
b. 1s2 2s2 2p4 3s2 3p4
c. 1s2 1p6 2s2 2p4
d. 1s2 2s2 2p6 3s2 3p2

91.    A 1500 kg car travels along a highway at a speed of 20 m/s. What is its kinetic energy?
a. 2.5 x 105 J
b. 3.0 x 105 J
c. 6.0 x 105 J
d. 15.0 x 105 J

92.    When an object is moving at constant velocity, it is
a. at rest
b. moving at an unchanged speed
c. moving at an unchanged speed in a straight-line path
d. moving at an unchanged speed in a circular path

93.    A mass of 5 kg moves with a velocity of 6 m/s. The kinetic energy of the object, in joules, is
a. 30 joules
b. 75 joules
c. 90 joules
d. 150 joules

94.    When a source of sound approaches an observer, measurements will show an increase in the ______ of the sound
a. wavelength
b. speed
c. frequency
d. all of the above

95.    A freely falling object is traveling at 50 m/s. One second later its speed is about
a. 10 m/s
b. 50 m/s
c. 60 m/s
d. 100 m/s

96.    The energy of molecular motion is manifested as
a. chemical energy
b. potential energy
c. thermal energy
d. friction

97.    What is the maximum efficiency of a heat engine operating between hot and cold reservoirs at 500 K and 300 K respectively?
a. 30 per cent
b. 40 per cent
c. 50 per cent
d. 60 per cent

98.    Which form of energy is associated with an object's motion?
a. potential
b. kinetic
c. thermal
d. chemical

99.    A 1.0 hp engine compared to a 0.50 hp engine can do twice the work in
a. the same time
b. one-half the time
c. twice the time
d. one-fourth the time

100.  Which of the following statements best describes science?
a. Science is concerned with collecting and classifying as many facts as possible.
b. Science discovers and corrects its own mistakes.
c. Science is concerned with facts which are absolutely true.
d. Science is a glorious entertainment

101.  The theoretical efficiency of a heat engine operating between hot and cold reservoirs depends on
a. the hot reservoir temperature only
b. the cold reservoir temperature only
c. both the hot and cold reservoir temperatures
d. none of the above

102.  If both the mass and velocity of a ball are tripled, the kinetic energy is increased by a factor of
a. 3
b. 6
c. 9
d. 27

103.  The chief characteristic of a superconducting wire is
a. an extremely great length
b. a large cross-sectional area
c. an extremely high temperature
d. no resistance

104.  Kinetic energy is
a. always positive
b. the energy of position
c. a vector quantity
d. independent of mass

105.  An object with a mass of 25 kg acted upon by a net force of 10N will experience an acceleration of
a. 0.4 m/s2
b. 2.5 m/s2
c. 35 m/s
d. 250 m/s2

106.  When a moving truck is brought to rest,
a. the initial velocity is zero
b. the speed is constant
c. the acceleration is positive
d. the final velocity is zero

107.  If the frequency of a sound is doubled, the wavelength is
a. not affected
b. doubled
c. halved
d. 4 times the original wavelength

108.  The force of gravitational attraction upon a body is called its
a. mass
b. weight
c. volume
d. acceleration

109.  The spontaneous flow of hear from a colder body to a warmer body is in violation of the
a. first law of thermodynamics
b. second law of thermodynamics
c. third law of thermodynamics
d. none of the above

110.  The energy of position is
a. work
b. kinetic energy
c. displacement
d. potential energy