# Physics 8-31-18 Acceleration

PHYSICS: Thanks Gigi and Joseph for the awesome illustration of constant acceleration! π

Also – love how you began deriving formulas! I think you’ll come to find these are a ton better than some of the velocity problems you did. List what you are given and what you’re looking for – don’t forget things like “starts from rest” and “came to a stop.” Easy peazy! Okay, maybe not that easy! π

# Hon Chemistry 8-31-18 Another Look at Problem Solving

HON CHEMISTRY – Great job on the homework problems! Remember, in chemistry we use math as a tool, therefore we might work problems a little differently in chemistry than you do in your math class.

If you are converting, even if it’s not an “official SI conversion”, you MUST show your work using the Q Formula. When working other problems, don’t forget to follow these problem solving steps:

• Analyze – write down what you’re given and what you’re looking for
• Plan – write a formula where you isolate the unknown on one side by itself
• Compute – plug in your data, numbers and units; then cancel the units, and if they cancel correctly, go on to the calculator. Be sure and give your answer what the correct units.
• Evaluate – does your answer make sense, have you used the correct units, do you have the correct sig figs?

Have a great extra long weekend!!

# Physics 8-30-18 Tortoise & the Hare and Intro to Acceleration

PHYSICS: Great work on the tortoise and the hare problem! And great intro to acceleration!

How are you doing on the “tough” problems? I’ve said it before, but remember a few things: You weren’t born knowing how to do these – give yourself a little time. On the really good ones, just one formula won’t work – begin with writing what your know. These are some of the hardest problems we’ll work in physics – not because the formulas are hard, but because knowing how to reason through them is so challenging.

You are doing a great job! Some good advice – go work them again! I promise, it will be good for you. Remember, don’t open the solutions you wrote in your notes! Try them without it!! If you have to, peek, but then don’t stop until you can work the entire problem through without looking!

# Hon Chemistry 8-30-18 Conversion Factors, Pt. 2

HON CHEMISTRY: Great job with our start on using conversion factors to work more advanced conversions! It’s good to able to convert from one unit to another, but can you use that info to solve a real world problem?

Remember, this isn’t just about getting an answer – some of you can do that in your head. This is about being able to convert from one unit to another using the Q-formula. (And yes, you have to do it that way!). Now go forth and conquer!

# Chemistry 8-30-18 Conversion Factors

CHEMISTRY: Great job with our start on using conversion factors to work problems! Hopefully this was a review from your earlier academic life. We’ll crank it up a notch tomorrow!! π

Remember, this isn’t just about getting an answer – some of you can do that in your head. This is about being able to convert from one unit to another using the Q-formula. (And yes, you have to do it that way!)

Make sure you practice using your notes tonight, it’ll help you remember the steps we followed today in class!

If you need more practice on these or other problems, what about a HELP SESSION?

# Chemistry 8-29-18 Significant Figures HW & Scientific Notation

CHEMISTRY – I like the way you are catching on to significant figures! Here are the last of the notes on calculating with Sig Figs!

And great job with scientific notation today! Did you realize your calculator was so smart? Have you conquered it yet?

Remember, the best way to really learn all of the things from this chapter is practice, practice, practice! That’s the reason it’s so important to do your homework! I give it to you so you can practice and put together all we talked about in class ….cuz I love you! π

Also super important – SI quiz tomorrow! Make sure you are actively studying for it, not just looking over it!!

flickr photo by Robert S Donovan

# Hon Chemistry 8-29-18 Conversion Factors

HON CHEMISTRY: So you can estimate out how fast you can drive in at least one parking lot in Guatemala – but can you show me how you solved the problem? Can I trust the validity of your work?

Good job on remembering how to use conversion factors! Remember, this isn’t just about getting an answer – some of you can do that in your head. This is about being able to convert from one unit to another using the Q-formula. (And yes, you have to do it that way!)

I posted a slightly different lesson from last year below – I turned on the mic today, but forgot to turn on the receiver!

# Chemistry 8-28-18 Significant Figures

CHEMISTRY: I LOVE the way you are catching on to significant figures! And how will you really unlock the puzzle of sig figs? Practice!!

Two super important things: Make sure you are actively studying for the SI quiz! Also super important – keep up with your homework!! The reason I give it to you so you can practice and put together all we talked about in class ….cuz I love you! π

Be sure and check your syllabus!!

# Hon Chemistry 8-28-18 Significant Figures

HON CHEMISTRY: Great job remembering significant figures and scientific notation! Now go forth and practice what you learned today!

Two super important things: Make sure you are actively studying for the SI quiz – check your syllabus for info about it! Also super important – keep up with your homework!! The reason I give it to you so you can practice and put together all we talked about in class ….cuz I love you! π

Be sure and check the syllabus!!

# Physics 8-24-18 Velocity Problems

PHYSICS – Here are the velocity problems from today. You did a great job on these! Do you see what I mean about learning to think through them?

Stay strong on these problems! Make sure to do more than just show the math – be sure that I can also follow your logic in the formulas. Ditto with units, etc.

Don’t give up on the tortoise and the hare! A couple of hints: remember the problems we did in class today – it’s kind of like those. The distance the tortoise travels is the same as the distance the hare travels plus the extra 20 cm he was ahead. Also, the time the hare raced is equal to the time of the tortoise minus those two minutes he rested.

We’ll work through them in class if you need some help, but FIRST, make sure you have already worked them yourself – even if you think your work is wrong!

Now go have fun! π