×

### Let's log you in.

or

Don't have a StudySoup account? Create one here!

×

### Create a StudySoup account

#### Be part of our community, it's free to join!

or

##### By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

## Week 1 Lecture 1: Base Units and Significant Figures

by: Justin Bartell

13

0

2

# Week 1 Lecture 1: Base Units and Significant Figures ECH 3023

Marketplace > Florida State University > Engineering > ECH 3023 > Week 1 Lecture 1 Base Units and Significant Figures
Justin Bartell
FSU
GPA 3.977

Get a free preview of these Notes, just enter your email below.

×
Unlock Preview

### Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

This reviews the Seven Base Units, the SI units, and significant figure rules.
COURSE
Mass & Energy Balances I
PROF.
Dr. Yeboah
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
Engineering, Math
KARMA
25 ?

## Popular in Engineering

This 2 page Class Notes was uploaded by Justin Bartell on Monday September 5, 2016. The Class Notes belongs to ECH 3023 at Florida State University taught by Dr. Yeboah in Fall 2016. Since its upload, it has received 13 views. For similar materials see Mass & Energy Balances I in Engineering at Florida State University.

×

## Reviews for Week 1 Lecture 1: Base Units and Significant Figures

×

×

### What is Karma?

#### You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/05/16
ECH 3023– Y. Yeboah Week 1 – 01 (Tuesday Lecture 8/30/2016) Base Units and Sig Figs • Seven Base Units: length, mass, moles, time, temperature, current, light intensity. • SI units: meters, kilogram, gram moles, seconds, Kelvin, ampere, candela • Multiple units: ex. Centimeter vs. millimeter vs. kilometer, etc. ­Common prefixes: Terra: 10^12 Giga: 10^9 Mega: 10^6 Kilo: 10^3 Centi: 10^­2 Milli: 10^­3 Micro: 10^­6 Nano: 10^­9 • Derived units: any unit built from the seven Base Units ­Volume (length^3), Force (mass*length / time^2), etc. • Significant figures ­ Without decimal: sig figs start at rightmost nonzero digit counting left. o Ex. 4980 has 3 sig figs (8, 9, and 4) o 3100000 has 2 sig figs (1 and 3) o 12345 has 5 sig figs (5, 4, 3, 2, and 1) ­ With decimal: sig figs start at leftmost nonzero digit counting right. o Ex. 1.2345 has 5 sig figs (1, 2, 3, 4, and 5) o 4980. has 4 sig figs (4, 9, 8, and 0) o 0.0000012 has 2 sig figs (1 and 2) o 10.02 has 4 sig figs (1, 0, 0, and 2) ­ Multiplying/Dividing: count number of sig figs for each number, complete  multiplication/division, round to number of lowest sig fig. o Ex. 2 * 1.4 = 3  First number has 1 sig fig, second number has 2 sig figs. Rough  multiplication gives 2.8. However, we now round to 1 sig fig to get 3. o 1.04 * 1 = 1  First number has 3 sig figs, second number has 1. Rough  multiplication gives 1.04. However we now round to 1 sig fig to get 1. o 27 * 2.2 = 59  First number has 2 sig figs and so does the second number. Rough  multiplication gives us 59.4. However, we round to 2 sig figs to get 59. ­ Weird Rounding Rules (with number 5!) o When rounding with a 5, you can only round to make an even digit.   Round to 2 sig figs: 15.5 = 16  Round to 2 sig figs: 14.5 = 14 ­ Adding/subtracting o Line up the decimal point of all numbers, add/subtract, round to the rightmost  common significant digit.  Ex. 101.01 + 91.2 = 192.2  When lining the decimal point, the rightmost common  significant digit is in the tenths place (the 1 in 91.2). Adding  we get 192.21, so we round to the tenths place to get 192.2  9100 + 21 = 9100  After lining up, the rightmost common significant digit is the  thousands place. Adding we get 9121, so we round to  thousands place to get 9100.  110. + 51 = 161   After lining up, the rightmost common significant digit is the  units digit. Adding we get 161 and no rounding is necessary.

×

×

×

### You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

## Why people love StudySoup

Bentley McCaw University of Florida

#### "I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Allison Fischer University of Alabama

#### "I signed up to be an Elite Notetaker with 2 of my sorority sisters this semester. We just posted our notes weekly and were each making over \$600 per month. I LOVE StudySoup!"

Bentley McCaw University of Florida

Forbes

#### "Their 'Elite Notetakers' are making over \$1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!
×

### Refund Policy

#### STUDYSOUP CANCELLATION POLICY

All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email support@studysoup.com

#### STUDYSOUP REFUND POLICY

StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here: support@studysoup.com

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to support@studysoup.com

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.