# FizziksGuy

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## Blog Comments posted by FizziksGuy

### DSLR or iPhone Camera??

Great post Dan -- as an engineer who spent more than 10 years building and refining CCD image sensors for DSLRs (competing with cMOS sensors), your summary and comparison is spot on!

### Physics of a Hockey Check

Sounds like the longer you can extend the impact, the lower the force (Impulse-Momentum Theorem?)  Almost like making yourself a human airbag!

### Haley's blog - Field Hockey

If you want to send the ball down the field, how do you change its motion?  More physics!

### 1st blog post

Hmmm... if you want to get down the hill as fast as possible, how do you choose your path?  Bet there's some physics involved there too!  (Our student teacher 2 years ago was an expert nordic racer!)

### physics in dance

Oooh, great concept, center of gravity is VERY important.  And you're hitting it right on the head, when you spin, you have a rotational inertia.  As you pull your arms in, your rotational inertia decreases, so you spin faster.  As you move them out, your rotational inertia increases, so you spin more slowly (think figure skater!)  EXCELLENT connection!

### 3rd Blog

Great example!  Sounds like there's a bit of an art to the quarterback knowing at what angle to throw the football so that it reaches the receiver at the optimal time and position!

### The 4th Dimension

Pretty amazing mind-bending stuff!  Nice post.  It's amazing to me how deep we are able to model the universe around us beyond what we can easily perceive -- and it just keeps going!

### Jaclyn's Blog: Volleyball

I wonder how fast you can spike a ball?  How long does a defender have to get their hands up in front of their nose when your attack heads toward their face?  How does that compare to the numbers we found in our reaction time lab?

### Gravity!

Ooooh, now you've got me thinking.  I'm thinking we'll have to do a lab that involves dumbbells and pushups and running up stairs!

### Inertia of bodies

Great job applying what you see everyday to the things you're learning about in class.  Well done!

### Newtons Law and Running

I don't mind running so much in small doses -- it's a requirement if the ice cream truck doesn't stop when you try to flag it down!

### Sailing

How exciting -- best of luck to your father and brother!

We'll study the fundamentals of sailing (Newton's Laws of Motion) starting Monday -- you'll have tons of fuel for your blogs as you apply those fundamentals to something you can teach all of us about!

### Bouncing a Ball

We'll have to analyze all those momentum transfers between the floor and the ball here shortly!

### Doctor Who Season 4 Episode 1 "Voyage of the Damned"

Great post with lots of amusing visuals!

### Destiny (the Video Game)

I'm jealous.  I remember when i had time to play some of these.  Instead, last night's excitement include an episode of Sofia the First "The Emerald Key" -- some great dramatic tension at the end -- coupled with a trio of Elmo songs and reading two chapters of the third installment of the "Princess Tiara" book series.

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### Nick Miller & The Art of Soundproofing

Great post!  And to add some trivia, Zooey Deschanel also sings two songs, including the title track, in the recently released Winnie The Pooh movie!

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### Conundrums of building in space (I.E. crashing stuff in Space Engineers)

I think I'm detecting the beginnings of an end-of-year project.  Let's talk and see what we can potentially develop!

### Lifting Bro's Use Physics Too!

Great post, I love it.  We actually did a crossfit workout last year where our score was determined by the total number of pounds lifted from the ground to over our head in a set time.  When we were done it was pretty cool to actually go calculate how many joules of work we did (was close to 50,000 joules per person).  It'd be cool to try to estimate how many joules of energy you used in an entire workout, then calculate your power output for the workout.  You could even find out how many slices of pizza that workout was equivalent too (never enough!)

And there's TONS of physics and technique in lifting.  My best clean and jerk is ~185 pounds, yet there's an athlete at our gym who is close to 50 pounds lighter than me whose C&J is 285. Strength is important, but it's also all about knowing how to move to maximize your strength!

### Blog Post #3

Tons of physics in dancing, great application of what we're starting to learn in class to something exciting out of class!

### Blog #3

Great news Mike -- we will do lots of analysis of the collision of football players... coming up soon!

### Blog Post #1

Looking forward to learning about physics (and lack thereof) in Doctor Who!

### Blog #2

If you're stuck on the lab, of course, come see me -- happy to help!

### Guitar Physics (Pinch harmonics, or "squeals")

Tremendous post, great physics, and better music!

### Blogging Assignment #1

Absolutely, TONS of physics in cheerleading.  Of specific interest coming up soon... free fall and projectile motion!

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