Ch1-H1-solutions - louey(cal2859 Ch1-H1 florin(56930 This...

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louey (cal2859) – Ch1-H1 – forin – (56930) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices be±ore answering. 001 (part 1 of 7) 3.0 points A proton is located at: a 3 × 10 10 m , 9 × 10 10 m , 8 × 10 10 m A . ²ind vr , the location o± the proton ±rom the origin where = a r x , r y , r z A . What is r x in meters? Your answer must be within ± 5.0% Correct answer: 3 × 10 10 m. Explanation: The position o± the proton is the vector ±rom the origin to the location o± the proton. In this case: a 3 × 10 10 m , 9 × 10 10 m , 8 × 10 10 m A 002 (part 2 of 7) 3.0 points What is r y in meters? Your answer must be within ± 5.0% Correct answer: 9 × 10 10 m. Explanation: The position o± the proton is the vector ±rom the origin to the location o± the proton. In this case: a 3 × 10 10 m , 9 × 10 10 m , 8 × 10 10 m A 003 (part 3 of 7) 3.0 points What is r z in meters? Your answer must be within ± 5.0% Correct answer: 8 × 10 10 m. Explanation: The position o± the proton is the vector ±rom the origin to the location o± the proton. In this case: a 3 × 10 10 m , 9 × 10 10 m , 8 × 10 10 m A 004 (part 4 of 7) 2.0 points What is | | in meters? Your answer must be within ± 5.0% Correct answer: 1 . 24097 × 10 9 m. Explanation: The magnitude o± is ±ound by: | | = r r 2 x + r 2 y + r 2 z where: r x = 3 × 10 10 m r y = 9 × 10 10 m r z = 8 × 10 10 m there±ore: | | = 1 . 24097 × 10 9 m 005 (part 5 of 7) 3.0 points What is ˆ r x , the x component o± the unit vector in the direction o± ? Your answer must be within ± 5.0% Correct answer: 0 . 241747. Explanation: The unit vector has the ±orm: ˆ r = | | . This means that the x component o± the unit vector is: ˆ r x = r x | | = 3 × 10 10 m 1 . 24097 × 10 9 m = 0 . 241747 006 (part 6 of 7) 3.0 points What is ˆ r y , the y component o± the unit vector in the direction o± ? Your answer must be within ± 5.0% Correct answer: 0 . 725241. Explanation: The unit vector has the ±orm: ˆ r = | | .
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louey (cal2859) – Ch1-H1 – forin – (56930) 2 This means that the y component oF the unit vector is: ˆ r y = r y | vr | = 9 × 10 10 m 1 . 24097 × 10 9 m = 0 . 725241 007 (part 7 of 7) 3.0 points What is ˆ r z , the z component oF the unit vector in the direction oF ? Your answer must be within ± 5.0% Correct answer: 0 . 644658. Explanation: The unit vector has the Form: ˆ r = | | . This means that the z component oF the unit vector is: ˆ r z = r z | | = 8 × 10 10 m 1 . 24097 × 10 9 m = 0 . 644658 008 (part 1 of 5) 10.0 points A planet is located at v P = a− 2 × 10 10 , 4 × 10 10 , 2 × 10 10 A . A star is located at v S = a 3 × 10 10 , 3 × 10 10 , 5 × 10 10 A . What is v R , the vector pointing From the planet to the star? 1. v R = a 8 × 10 10 , 1 . 2 × 10 11 , 6 × 10 10 A 2. v R = a 3 × 10 10 , 9 × 10 10 , 5 × 10 10 A 3. v R = a 5 × 10 10 , 7 × 10 10 , 7 × 10 10 A cor- rect 4.
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Ch1-H1-solutions - louey(cal2859 Ch1-H1 florin(56930 This...

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