test bank for university physics with modern physics
14th edition by hugh d young
roger a freedman
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University of South Africa (Unisa)
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TEST BANK FOR UNIVERSITY
PHYSICS WITH MODERN PHYSICS,
14TH EDITION BY HUGH D.
YOUNG, ROGER A. FREEDMAN
,MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The current definition of the standard meter of length is based on 1)
A) the length of a particular object kept in France.
B) the distance between the earth's equator and north pole.
C) the distance traveled by light in a vacuum.
D) the distance between the earth and the sun.
2) The current definition of the standard second of time is based on 2)
A) the frequency of radiation emitted by cesium atoms.
B) the duration of one year.
C) the earth's rotation rate.
D) the oscillation of a particular pendulum kept in France.
3) The current definition of the standard kilogram of mass is based on 3)
A) the mass of the earth.
B) the mass a particular object kept in France.
C) the mass of the sun.
D) the mass of a cesium-133 atom.
4) If a woman weighs 125 lb, her mass expressed in kilograms is x kg, where x is 4)
A) less than 125. B) greater than 125.
5) If a tree is 15 m tall, its height expressed in feet is x ft, where x is 5)
A) less than 15. B) greater than 15.
6) If a flower is 6.5 cm wide, its width expressed in millimeters is x mm, where x is 6)
A) less than 6.5. B) greater than 6.5.
7) If an operatic aria lasts for 5.75 min, its length expressed in seconds is x s, where x is 7)
A) less than 5.75. B) greater than 5.75.
8) Scientists use the metric system chiefly because it is more accurate than the English 8)
system.
A) True B) False
9) When adding two numbers, the number of significant figures in the sum is equal to the 9)
number of significant figures in the least accurate of the numbers being added.
A) True B) False
10) When determining the number of significant figures in a number, zeroes to the left of the 10)
decimal point are never counted.
A) True B) False
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, 11) Which of the following is an accurate statement? 11)
A) Rotating a vector about an axis passing through the tip of the vector does not
change the vector.
B) The magnitude of a vector can be zero even though one of its components is not
zero.
C) It is possible to add a scalar quantity to a vector.
D) The magnitude of a vector is independent of the coordinate system used.
E) Even though two vectors have unequal magnitudes, it is possible that their vector
sum is zero.
12) If A - B = 0, then the vectors A and B have equal magnitudes and are directed in the 12)
opposite directions from each other.
A) True B) False
13) Under what condition is | A - B | = A + B? 13)
A) The magnitude of vector B is zero.
B) Vectors A and B are in the same direction.
C) Vectors A and B are in opposite directions.
D) Vectors A and B are in perpendicular directions.
E) The statement is never true.
14) If A > B, under what condition is | A - B | = A - B? 14)
A) Vectors A and B are in opposite directions.
B) Vectors A and B are in the same direction.
C) Vectors A and B re in perpendicular directions.
D) The statement is never true.
E) The statement is always true.
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
15) For the vectors shown in the figure, express vector S in terms of vectors M 15)
and N .
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, MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
16) The magnitude of a vector can never be less than the magnitude of one of its 16)
components.
A) True B) False
17) If the magnitude of vector A is less than the magnitude of vector B , then the x 17)
component of A is less than the x component of B .
A) True B) False
18) If the eastward component of vector A is equal to the westward component of vector 18)
B and their northward components are equal. Which one of the following statements
about these two vectors is correct?
A) Vector A is parallel to vector B .
B) The magnitude of vector A is twice the magnitude of vector B .
C) Vectors A and B point in opposite directions.
D) The magnitude of vector A is equal to the magnitude of vector B .
E) Vector A is perpendicular to vector B .
19) If all the components of a vector are equal to 1, then that vector is a unit vector. 19)
A) True B) False
20) If the dot product of two nonzero vectors is zero, the vectors must be perpendicular to 20)
each other.
A) True B) False
21) If two nonzero vectors point in the same direction, their dot product must be zero. 21)
A) True B) False
22) The value of the dot product of two vectors depends on the particular coordinate 22)
system being used.
A) True B) False
23) If two vectors are perpendicular to each other, their cross product must be zero. 23)
A) True B) False
24) If two vectors point in opposite directions, their cross product must be zero. 24)
A) True B) False
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