Quiz1spring2004

# 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 pages 1–2. Sign up to view the full content.

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

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.

## 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
Ask a homework question - tutors are online