This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Describe how ultraviolet light degrades plastics and why it does not generally degrade metals. ... (Read 16 times)

robinn137

  • Hero Member
  • *****
  • Posts: 544
on: Aug 19, 2018
Describe how ultraviolet light degrades plastics and why it does not generally degrade metals.
 
  What will be an ideal response?

Question 2

A stress-strain experiment was done on a plastic and the following data was noted on the plot of the experiment: ultimate tensile strength = 9000 psi, yield strength = 5000 psi, proportional limit = 4000 psi, strain-to-failure = 0.025, strain at yield = 0.020, stain at proportional limit = 0.015 . The original length of the sample was 4 inches. What was the modulus?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jordangronback

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Aug 19, 2018
Answer to Question 1

Ultraviolet

Answer to Question 2

The modulus is calculated by examining only the slope of the stress-strain curve before yield, that is before and non-linear behavior is seen. Hence, the slope at the beginning of the experiment is stress at yield (5000 psi) divided by strain at proportional limit


robinn137

  • Member
  • Posts: 544
Reply 2 on: Aug 19, 2018
Great answer, keep it coming :)

phuda

  • Member
  • Posts: 348
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Phytochrome controls germination by responding to red/far red light signals. Phytochrome controls germination by responding to red/far red light signals.
Excitation of isolated chlorophyll by light. Excitation of isolated chlorophyll by light.
Fun with light refraction Fun with light refraction
Representative Light Curves of Eclipsing Binaries Representative Light Curves of Eclipsing Binaries
Use dye specifically made for coolant when checking for leaks using a black light. Use dye specifically made for coolant when checking for leaks using a black light.
Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ... Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ...
Video: Alzheimer's Disease

For a complete list of videos, visit our video library