Quiz1spring2004 - ENSC 3313 Spring 2004 Quiz 1-ANSWERS Name Answer ONLY 4 of the 6 questions show all work 1point each 1 A rubber band was

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

View Full Document Right Arrow Icon
ENSC 3313, Spring 2004 Quiz 1- ANSWERS Name_________________________ Answer ONLY 4 of the 6 questions, show all work, 1point each 1. A rubber band was stretched to twice its original length which required an initial 7 lb f . After a month, it was found that only 5 lb f was necessary to keep the rubber band in this stretched state. Calculate the force required to keep the rubber band stretched after 1 year assuming it decays exponentially with time. ANSWER Exponential decay problem τ t e F F = 0 First find the decay constant: t F F = 0 ln solve for τ : () months 97 . 2 7 / 5 ln 1 = = Now, calculate the required force after 12 months: f 97 . 2 12 lb 123 . 0 7 = = e F 2. In class, we discussed how the opaqueness of metals and the molecular shape of polymers are related to there respective bonding types. Discuss why optical frequencies are reflected and/or absorbed by metals and why polymer molecules are coiled (think cooked spaghetti). ANSWER
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/10/2012 for the course ENSC 3313 taught by Professor Staff during the Fall '11 term at Oklahoma State.

Page1 / 2

Quiz1spring2004 - ENSC 3313 Spring 2004 Quiz 1-ANSWERS Name Answer ONLY 4 of the 6 questions show all work 1point each 1 A rubber band was

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online