Re: arons and dry ice

[Joe Heafner <heafnerj@VNET.NET>]

> From: Bob LaMontagne <rlamont@POSTOFFICE.PROVIDENCE.EDU>
>
> I love this one. You can get undrilled bowing balls fairly cheap at places like
> K-Mart. I bought both an 8 lb and a 16 lb ball. They are the same size so you have to
> interact with them to tell which is which. I have the students bat the lighter one
> with a foam bat to see how it accelerates. After a while I substitute the heavier one
> without saying anything. The look of surprise on their faces is priceless - they can
> directly feel the effect of doubling the mass.
Ooooooooo...I like this! How much does an undrilled ball go for?


Cheers,
Joe Heafner - Instructional Astronomy and Physics
Home Page http://users.vnet.net/heafnerj/index.html
I don't have a Lexus, but I do have a Mac. Same thing.

This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.