CH304K Chapter 1 Notes part 3 (1)

# For example a dozen 12 exactly no exceptions when

This preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: wer is sensible. EXCEPTIONS TO ROUNDING: Some numbers are accurate by DEFINITION. For example: a dozen = 12. Exactly. No exceptions. When using these numbers in your calculations, IGNORE how many significant figures they have. Treat them as if they were infinitely accurate. Some numbers are defined as infinitely accurate: For example 1 inch = 2.54cm exactly. Treat it like it was 2.54000000…. Others will be pointed out to you as the need arises. Density PHYSICAL property: Can be used to distinguish two substances (e.g., alcohol and water). Density = MASS divided by VOLUME. The DENSITY OF WATER IS 1g/ml Density of Gases << Density of Liquids < Density of Solids units include: g/mL, kg/mL, lb/pint, mg/cc Density of Odd Shaped Solids Mass: use a scale Volume: can calculate for a regular shape. For an irregular shape use the ARCHIMEDES principle: An object that sinks in water displaces a volume of water equal to its own volume. Density of Coke vs. Diet Coke: Demo to be done in class....
View Full Document

## This note was uploaded on 02/26/2014 for the course CH 304k taught by Professor Walker during the Spring '08 term at University of Texas.

Ask a homework question - tutors are online