Re: Objections pouring in.

Re: Objections pouring in.

[David Arnold]

Al,

P.S. It would be a better problem if we set 20% to 80% and 80% to 20%.

Also, if you could, can you compile these and send PS files. I need
something my students can read. It would be greatly appreciated.

 At 10:46 AM 1/20/01 -0600, you wrote:
>Dave,
>
>Yesterday, I sent you the maple-text
>versions of the answers to 2.2 and 2.3.
>These are plain ascii files which
>should be readable in any editor
>(you don't have to have maple on your machine).
>In this e-mail, I have attached both the 
>maple worksheet and the exported text version
>of the answers to section 2.4.
>I'm working on section 2.5 this weekend
>and should be able to send the answers
>to this section on Monday.
>
>Speaking of questions on the exercises,
>I'd be curious to know your opinion on
>Exercise 32 on page 42 of chapter 2
>(this may actually be exercise 33 since
>there appears to be two exercise 30s
>in this section). I don't understand this
>problem at all. There are two radioactive
>isotopes and the problem states "at first,
>20% of the decay comes from the one of the
>isotopes. Does this mean that the other 
>is not decaying? I'm totally perplexed
>by this problem. Evidently, the answer checking
>outfit in Mass. is also perplexed since
>they came up with a negative answer for time.
>Any light you can shed on this one would
>be appreciated.
>
>Al
>
>
>On Fri, 19 Jan 2001, David Arnold wrote:
>
>> John, Al, 
>> 
>> My students are raising questions on the exercises. For example, section
>> 2.3, exercise #1, page 50:
>> 
>> Ken and Adrienne ask: I don't think this problem is can be solved without
>> an more information. Should we assume that the vessel is at a dead stop?
>> That assumption would raise some interesting questions as well. If the
>> vessel is moving, are we to assume that the acceleration is in the same
>> direction as the
>> vessel's motion?
>> 
>> Exercise #5, same set: 
>> 
>> Adriene asks: "Near the surface of the earth?"
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>
>Attachment Converted: "c:\eudora\attach\sec2.4.mws"
>
>Attachment Converted: "c:\eudora\attach\sec2.4.txt"
>