Feedback — Vectors in 1D: Component RepresentationHelp
You submitted this quiz on Mon 19 May 2014 11:04 PM CDT. You got a score
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Some questions provided by Matter and Interactions (3rd. Ed.), R. Chabay & B. Sherwood.
Copyright (2010, John Wiley & Sons). This material is used by permission of John Wiley & Sons, Inc.
Question 1
A⃗ =⟨0,0,−900⟩ and B⃗ =⟨0,0,200⟩. Calculate the following:
the x component of A⃗
+B⃗
Answer for Question 1
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0
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1.00 / 1.00
Question Explanation
Answer : 0
Question 2
the y component of A⃗
1.00
+B⃗
Ex
Answer for Question 2
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Your Answer
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0
Correct
Total
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 3
the z component of A⃗
+B⃗
Answer for Question 3
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Your Answer
-700
Total
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Correct
1.00
1.00 / 1.00
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Question Explanation
Answer : -700
Question 4
|A⃗ +B⃗ |
Answer for Question 4
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Your Answer
700
Total
Question Explanation
Answer : 700
Question 5
|A⃗ |
Answer for Question 5
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1.00
1.00 / 1.00
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Your Answer
900
Score
Correct
Total
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 900
Question 6
|B⃗ |
Answer for Question 6
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Your Answer
200
Total
Question Explanation
Answer : 200
Question 7
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Correct
1.00
1.00 / 1.00
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|A⃗ |+|B⃗ |
Answer for Question 7
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1100
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1.00
1.00 / 1.00
Question Explanation
Answer : 1100
Question 8
a⃗ =⟨0,6,0⟩ and b⃗ =⟨0,9,0⟩ , compute the x component of a⃗ −b⃗ .
Answer for Question 8
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0
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1.00
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Total
1.00 / 1.00
Question Explanation
Answer : 0
Question 9
Following the previous question, compute the y component of a⃗
−b⃗ .
Answer for Question 9
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Your Answer
-3
Score
1.00
Correct
Total
1.00 / 1.00
Question Explanation
Answer : -3
Question 10
Following the previous question, compute the z component of a⃗
Answer for Question 10
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−b⃗ .
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Your Answer
0
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1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 11
a⃗ =⟨0,0,−2⟩, compute the x component of a^.
Answer for Question 11
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Your Answer
0
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1.00
1.00 / 1.00
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Answer : 0
Question 12
Following the previous question, compute the y component of a^.
Answer for Question 12
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Your Answer
0
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1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 13
Following the previous question, compute the z component of a^.
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Score
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1
Incorrect
Total
0.00
0.00 / 1.00
Question Explanation
Answer : -1
Question 14
Any vector can be written as a unit vector multiplied by the magnitude of the vector (a positive
scalar). What is the magnitude of the following vector?
⟨0,0,6⟩
Answer for Question 14
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Your Answer
0,0,6
Total
Question Explanation
Answer : 6
Score
Incorrect
0.00
0.00 / 1.00
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Question 15
Following the previous question, when ⟨0,0,6⟩ is written as a unit vector multiplied by the magnitude
of the vector (a positive scalar), what is the x component of the unit vector?
Answer for Question 15
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Your Answer
0
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1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 16
Following the previous question, when ⟨0,0,6⟩ is written as a unit vector multiplied by the magnitude
of the vector (a positive scalar), what is the y component of the unit vector?
Answer for Question 16
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0
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Total
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 17
Following the previous question, when ⟨0,0,6⟩ is written as a unit vector multiplied by the magnitude
of the vector (a positive scalar), what is the z component of the unit vector?
Answer for Question 17
You entered:
Your Answer
1
Total
Question Explanation
Answer : 1
Question 18
Score
Correct
1.00
1.00 / 1.00
Ex
Any vector can be written as a unit vector multiplied by the magnitude of the vector (a positive
scalar). What is the magnitude of the following vector?
⟨0,−681,0⟩
Answer for Question 18
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Your Answer
0,681,0
Total
Score
Incorrect
0.00
0.00 / 1.00
Question Explanation
Answer : 681
Question 19
Following the previous question, when ⟨0,−681,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the x component of the unit vector?
Answer for Question 19
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Ex
Your Answer
0
Score
Correct
Total
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 20
Following the previous question, when ⟨0,−681,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the y component of the unit vector?
Answer for Question 20
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Your Answer
-1
Total
Question Explanation
Answer : -1
Score
Correct
1.00
1.00 / 1.00
Ex
Question 21
Following the previous question, when ⟨0,−681,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the z component of the unit vector?
Answer for Question 21
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Your Answer
0
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Total
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 22
Any vector can be written as a unit vector multiplied by the magnitude of the vector (a positive
scalar). What is the magnitude of the following vector?
⟨0.00293,0,0⟩
Answer for Question 22
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Ex
Your Answer
0.00293,0,0
Score
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1.00
1.00 / 1.00
Question Explanation
Answer : 0.00293
Question 23
Following the previous question, when ⟨0.00293,0,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the x component of the unit vector?
Answer for Question 23
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Your Answer
1
Total
Question Explanation
Answer : 1
Score
Correct
1.00
1.00 / 1.00
Ex
Question 24
Following the previous question, when ⟨0.00293,0,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the y component of the unit vector?
Answer for Question 24
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Your Answer
0
Total
Score
Correct
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 25
Following the previous question, when ⟨0.00293,0,0⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the z component of the unit vector?
Answer for Question 25
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Your Answer
Score
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0
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Total
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 26
Any vector can be written as a unit vector multiplied by the magnitude of the vector (a positive
scalar). What is the magnitude of the following vector?
⟨0,0,−6E6⟩
Note: please express your answer using scientific E notation. Answers in the form of a*b^c will be
rejected.
Answer for Question 26
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Your Answer
0,0,6E6
Total
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0.00
0.00 / 1.00
Ex
Answer : 6E6
Question 27
Following the previous question, when ⟨0,0,−6E6⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the x component of the unit vector?
Answer for Question 27
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Your Answer
0
Total
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Correct
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 28
Following the previous question, when ⟨0,0,−6E6⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the y component of the unit vector?
Answer for Question 28
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Ex
Your Answer
0
Score
Correct
Total
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 29
Following the previous question, when ⟨0,0,−6E6⟩ is written as a unit vector multiplied by the
magnitude of the vector (a positive scalar), what is the z component of the unit vector?
Answer for Question 29
You entered:
Your Answer
-1e0
Total
Question Explanation
Answer : -1
Score
Correct
1.00
1.00 / 1.00
Ex
Question 30
Which of the following are vectors? (Select all that apply).
Your Answer
Score
−3×10−6
Correct
0.17
5×⟨0,0,−9.5⟩
Correct
0.17
0
Correct
0.17
⟨0,0,−1⟩
Correct
0.17
⟨0,0,−0.7⟩
Correct
0.17
3.5
Correct
0.17
Total
1.00 / 1.00
Question Explanation
A single number is a scalar, not a vector.
Answer :
⟨0,0,−1⟩
5×⟨0,0,−9.5⟩
⟨0,0,−0.7⟩
Question 31
Which of the following are vectors? (Select all that apply).
Your Answer
Score
Ex
⟨rx,ry,rz⟩
Correct
0.14
r
Correct
0.14
10r⃗
Correct
0.14
rx+ry+rz
Correct
0.14
r⃗ 2
Inorrect
0.00
|r⃗ |
Inorrect
0.00
a⃗
Correct
0.14
Total
0.71 / 1.00
Question Explanation
Answer :
a⃗ ,r⃗ 2,10r⃗ ,10r⃗ ,⟨rx,ry,rz⟩
Question 32
If a⃗
=⟨0,0,7⟩ then what is the x component of 6a⃗ ?
Answer for Question 32
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Your Answer
Score
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0
Correct
Total
1.00
1.00 / 1.00
Question Explanation
Answer : 0
Question 33
Following the previous question, what is the y component of 6a⃗ ?
Answer for Question 33
You entered:
Your Answer
0
Score
Correct
Total
Question Explanation
Answer : 0
Question 34
Following the previous question, what is the z component of 6a⃗ ?
Answer for Question 34
1.00
1.00 / 1.00
Ex
You entered:
Your Answer
42
Score
Correct
Total
Ex
1.00
1.00 / 1.00
Question Explanation
Answer : 42
Question 35
If a⃗
=⟨0,0,7⟩ then how does the magnitude of 6a⃗
compare to a⃗ ?
Your Answer
The magnitude of 6a⃗ is the same as the magnitude of a⃗
The magnitude of 6a⃗ is a factor of 6 greater than the magnitude of a⃗ .
The magnitude of 6a⃗ is a factor of 6 less than the magnitude of a⃗ .
The magnitude of 6a⃗ is zero.
Not enough information given.
Total
Correct
Question Explanation
Answer : The magnitude of 6a⃗ is a factor of
6 greater than the magnitude of a⃗ .
Question 36
If p⃗
=⟨0,0,3⟩, what is 5+p⃗
Your Answer
This is a meaningless expression because a scalar cannot be added to a vector.
⟨0,0,15⟩
⟨0,0,8⟩
⟨0,0,0.60⟩
⟨0,0,−2⟩
Total
Question Explanation
This is a meaningless expression because a
scalar cannot be added to a vector.
Question 37
a⃗ =⟨0,0,7⟩ and b⃗ =⟨0,0,−5⟩, compute a⃗ +b⃗ . What is the x component of a⃗ +b⃗ ?
Correct
Answer for Question 37
You entered:
Your Answer
0
Score
Ex
1.00
Correct
Total
1.00 / 1.00
Question Explanation
Answer : 0
Question 38
Following the previous question, what is the y component of a⃗
+b⃗ ?
Answer for Question 38
You entered:
Your Answer
0
Total
Score
Correct
1.00
1.00 / 1.00
Ex
Question Explanation
Answer : 0
Question 39
Following the previous question, what is the z component of a⃗
+b⃗ ?
Answer for Question 39
You entered:
Your Answer
2
Total
Question Explanation
Answer : 2
Score
Correct
1.00
1.00 / 1.00
Ex