Students had to make a stop motion video representing a race between a constant velocity of 7 cm/s and a constant acceleration of 5.5 cm/s/s. Required a pretty good understanding of the kinematic equations and Microsoft Excel #Teach180 #ITeachPhysics pic.twitter.com/z2zYRZoEiL
— Joe Cossette (@cossettej) March 2, 2018
What is going on here? Is the eraser losing mass? weight? or does a scale actually measure something else entirely? ?#forcesonaramp #iteachphysics pic.twitter.com/2hulJ0FlpJ
— Joe Cossette (@cossettej) October 10, 2018
Question of the Day: How did I inflate this balloon? □□ #iteachphysics pic.twitter.com/6Z6geKgZwp
— Joe Cossette (@cossettej) February 14, 2019
To follow up from my last post, I used a hot plate and a bucket of ice to create a change in temperature. When the temperature decreases, so does the pressure and volume. □ It’s pretty cool to watch it all go down! □ pic.twitter.com/jPybCqd7Jd
— Joe Cossette (@cossettej) February 16, 2019
Index of Refraction in 3 Acts:
— Joe Cossette (@cossettej) December 14, 2018
Act 1 - The Disappearing Test Tube
Canola Oil has about the same index of refraction as pyrex. A test tube placed in a beaker of oil can be seen thanks to the oil/air transition. Fill that test tube with more oil and it vanishes! #iteachphysics pic.twitter.com/XVtqFttPne
Act 2 - The Invisible Flask
— Joe Cossette (@cossettej) December 14, 2018
I keep a spare flask hidden in a beaker of canola oil. With the exception of some markings along the side of the flask, it is invisible until removed. The small difference in index of refraction means that light doesn't bend at the oil/pyrex boundary pic.twitter.com/MZwrmKZFp2
Act 3 - The Magic Layers
— Joe Cossette (@cossettej) December 14, 2018
Since canola oil is less dense (physically, not optically) than water, the two can make distinct layers to show that this magical effect needs more than just a submerged test tube.
Physics is so cool! pic.twitter.com/YsKA7yOOXr
Visualizing magnetic fields with some strong magnets and an old TV monitor. Pro Tip: Make sure it's a monitor you don't plan on using anymore. □ #iteachphysics pic.twitter.com/rhlbWYlY4Q
— Joe Cossette (@cossettej) February 4, 2019
