# Extremely Difficult Unit Vector Question?

Select the correct answer for each of the four questions; e.g., if A is correct for question (i), and B is correct for questions (ii), (iii), and (iv), enter ABBB.
(i) Consider the vector A = 3î, and any non-zero vector B such that A×B = 0.
A. The vector B must be in the y-z plane.
B. The vector B must...
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Select the correct answer for each of the four questions; e.g., if A is correct for question (i), and B is correct for questions (ii), (iii), and (iv), enter ABBB.

(i) Consider the vector A = 3î, and any non-zero vector B such that A×B = 0.

A. The vector B must be in the y-z plane.

B. The vector B must be parallel to î.

C. The vector B must be parallel to k.

D. None of the three statements above is true.

(ii) Assume C = 2î. Which of the following statements is true?

A. If D = (1/2)ĵ, then C×D = 1k.

B. If D = −2k, then C×D = −4î.

C. If D = (−5/2)î, then C×D = 5ĵ.

D. None of the three statements above is true.

(iii) Consider the vector E = 1ĵ, and any non-zero vector F such that E·F = 0.

A. The vector F must be in the x-y plane.

B. The vector F must be in the y-z plane.

C. The vector F must be in the x-z plane.

D. None of the three statements above is true.

(iv) Consider the vector G = 4ĵ. Which of the following vectors H satisfies G·H = 1 ?

A. H = (1/4)î.

B. H = (1/4)î+ĵ+k.

C. H = î+(1/4)ĵ+k.

D. H = î+ĵ+(1/4)k.

E. H = î+ĵ+k.

I put DADC as my answer. My answer was wrong, please I really need help with this question

(i) Consider the vector A = 3î, and any non-zero vector B such that A×B = 0.

A. The vector B must be in the y-z plane.

B. The vector B must be parallel to î.

C. The vector B must be parallel to k.

D. None of the three statements above is true.

(ii) Assume C = 2î. Which of the following statements is true?

A. If D = (1/2)ĵ, then C×D = 1k.

B. If D = −2k, then C×D = −4î.

C. If D = (−5/2)î, then C×D = 5ĵ.

D. None of the three statements above is true.

(iii) Consider the vector E = 1ĵ, and any non-zero vector F such that E·F = 0.

A. The vector F must be in the x-y plane.

B. The vector F must be in the y-z plane.

C. The vector F must be in the x-z plane.

D. None of the three statements above is true.

(iv) Consider the vector G = 4ĵ. Which of the following vectors H satisfies G·H = 1 ?

A. H = (1/4)î.

B. H = (1/4)î+ĵ+k.

C. H = î+(1/4)ĵ+k.

D. H = î+ĵ+(1/4)k.

E. H = î+ĵ+k.

I put DADC as my answer. My answer was wrong, please I really need help with this question

Update:
John if you aren't going to help don't post at all m8
I've put in a legitimate amount of time in this question and there is nothing wrong with asking people what they think is the right answer. I don't understand why pricks like you still go on yahoo answers just to be asholes when they could be...
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John if you aren't going to help don't post at all m8

I've put in a legitimate amount of time in this question and there is nothing wrong with asking people what they think is the right answer. I don't understand why pricks like you still go on yahoo answers just to be asholes when they could be of help.

I've put in a legitimate amount of time in this question and there is nothing wrong with asking people what they think is the right answer. I don't understand why pricks like you still go on yahoo answers just to be asholes when they could be of help.

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