{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# 39_new - Ch1-H1 florin(56950 This print-out should have 30...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Ch1-H1 – florin – (56950) 2 This means that the y component of the unit vector is: ˆr y = r y |~r| −1 × 10 10 m = 9.89949 × 10 10 m = −0.101015 8 (part 7 of 7) 3.0 points What is ˆr z , the z component of the unit vector in the direction of ~r? Your answer must be within ± 5.0% Correct answer: 0.909137. Explanation: The unit vector has the form: ˆr = | ~r ~r| . This means that the z component of the unit vector is: ˆr z = r z |~r| 9 × 10 10 m = 9.89949 × 10 10 m = 0.909137 9 (part 1 of 5) 10.0 points A planet is located at ~ 10 10 10 P = h−3 × 10 , 5 × 10 , −5 × 10 O. A star is located at ~ 10 10 10 S = h4 × 10 , −7 × 10 , 1 × 10 O. What is ~ , the vector pointing from the planet R to the star? ~ 10 11 10 1. R = h7 × 10 , −1.2 × 10 , 7 × 10 O ~ 10 11 10 2. R = h7 × 10 , −1.2 × 10 , 6 × 10 O correct ~ 10 11 10 3. R = h5 × 10 , −1.2 × 10 , 3 × 10 O ~ 10 11 10 4. R = h5 × 10 , −1.3 × 10 , 4 × 10 O 5. ~ = h9 × 10 −7 × 10 5 × 10 O R , , Explanation: This is a vector subtraction problem. To find ~ , we subtract ~ ~ by respective com- R S P ponents: S x − P x = 4 × 10 10 − (−3 × 10 10 ) = 7 × 10 10 S y − P y = −7 × 10 10 − (5 × 10 10 ) = −1.2 × 10 11 S z − P z = 1 × 10 10 − (−5 × 10 10 ) = 6 × 10 10 So
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 8

39_new - Ch1-H1 florin(56950 This print-out should have 30...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online