Submitted by bryanlovell on Tue, 09/18/2018 - 10:54

The screencast video solutions here are second to none. Let Shaun Dychko, an expert physics teacher, guide you through every step.

Sometimes the difference between a right and wrong answer is how you plug it into your calculator. You won't make these kinds of mistakes since you will see how Shaun Dychko made the calculation.

Professionally made closed captions make the videos accessible and easier to comprehend.

The best way to practice is to try the problem first, then check the
final answer to quickly see if you got it right. Final answers are
**free**, so just take a look.

853

36.1

Publication Date

Aug. 12, 2015

Print

ISBN-10: 1-938168-93-3

ISBN-13: 978-1-938168-93-2

Digital

ISBN-10: 1-947172-17-4

ISBN-13: 978-1-947172-17-3

Download the PDF for **free** from OpenStax

Publication Date

Jun. 21, 2012

Print

ISBN-10: 1-938168-00-3

ISBN-13: 978-1-938168-00-0

Digital

ISBN-10: 1-947172-01-8

ISBN-13: 978-1-947172-01-2

Download the PDF for **free** from OpenStax

Submitted by bryanlovell on Tue, 09/18/2018 - 10:54

Submitted by ShaunDychko on Tue, 09/18/2018 - 11:04

Hi bryanlovell, thanks for the question. With a closer look at the calculator screenshot, notice the capital "E" between 1.897 and 27. This is my favorite shorthand way of writing "times 10^". It has an advantage over typing "* 10^27" since the calculator understands that 1.897E27 should be treated as a single number. This means that when dividing by 1.897E27, the 10^27 factor stays in the denominator where it belongs with the 1.897 factor. To explain by example, for the problem $\dfrac{20}{10} = 2$, typing "20 / 1E1 = 2" which is correct, whereas "20 / 1 * 10^1 = 200" which is not the expected answer since the capital E wasn't used. Of course, one could type "20 / (1 * 10^1) = 2" to get the correct answer with brackets, but avoiding the trouble of typing those brackets is the whole point of the capital E shortcut.

I hope you enjoy the solutions,

Shaun

In reply to In the video @ 45 seconds… by bryanlovell

Submitted by bryanlovell on Tue, 09/11/2018 - 06:09

Thank you for these videos. I do not have a strong math background and the textbooks don't really show all the work. Was able to get 100% on my last homework assignment. Well worth the money.

Submitted by ShaunDychko on Tue, 09/11/2018 - 06:37

Hi bryanlovell, that's awesome! Thanks for sharing that!

In reply to Thank you for these videos… by bryanlovell

Submitted by ShaunDychko on Tue, 09/11/2018 - 06:36

Hi raffielliemarley, that's a fair question. Currently I'm accelerating coverage of more chapters by doing only the odds the first time through. After covering odds in every chapter I'll probably do all the evens, depending on survey results (https://www.surveymonkey.com/r/N5WX87Y) from students.

I hope the videos are helpful with your studies,

Shaun

In reply to why no even probs? by raffielliemarley

In the video @ 45 seconds you have (1.898*10^27) but on the calculator you just do (1.898^27) Can you still get the correct answer doing it like that?