HW01-solutions

# HW01-solutions - sela (ds39632) – HW01 – janow –...

This preview shows pages 1–2. Sign up to view the full content.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: sela (ds39632) – HW01 – janow – (11196) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points How many square meters are in 2 . 6 acres? There are 640 acres in a square mile. Correct answer: 10517 . 3 m 2 . Explanation: Let : A = 2 . 6 acres . A = (2 . 6 acres) · 1 mi 2 640 acres · parenleftbigg 1609 m 1 mi parenrightbigg 2 = 10517 . 3 m 2 . 002 10.0 points For the given triangles, a = 12 m, b = 8 . 99 m, and α = 53 . 5 ◦ . a b α θ Find θ . Correct answer: 33 . 6662 ◦ . Explanation: Let the common side be x . a b x α θ In the triangle on the left, tan α = x a x = a tan α , and in the triangle on the right, sin θ = b x = b a tan α θ = arcsin parenleftbigg b a tan α parenrightbigg = arcsin bracketleftbigg 8 . 99 m (12 m) tan53 . 5 ◦ bracketrightbigg = 33 . 6662 ◦ . 003 10.0 points Convert the volume 6 . 61 in . 3 to m 3 , recalling that 1 in. = 2.54 cm and 100 cm = 1 m. Correct answer: 0 . 000108318 m 3 . Explanation: V = ( 6 . 61 in . 3 ) parenleftbigg 2 . 54 cm 1 in parenrightbigg 3 parenleftbigg 1 m 100 cm parenrightbigg 3 = . 000108318 m 3 . 004 (part 1 of 3) 10.0 points A girl delivering newspapers travels 2 blocks west, 8 blocks north, then 5 blocks east....
View Full Document

## This note was uploaded on 03/09/2012 for the course PHYS 111 taught by Professor Moro during the Spring '08 term at NJIT.

### Page1 / 4

HW01-solutions - sela (ds39632) – HW01 – janow –...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online