Re: Strange students question...

[Doug Craigen <dcc@cyberspc.mb.ca>]

On Thu, 13 Nov 1997 crvhs_dks@ncocc.ohio.gov wrote:

> 1.  Suppose you are served coffee at a restaurant and want it to be hot 
> when you are ready to drink it a few minutes later.  You should add the 
> room-temperature cream to it...
> 	a.  right away
> 	b.  when you are ready to drink it
> 	c.  either - the effect will be the same

Add the cream right away.  It then loses heat to the environment at a
slower rate due a smaller temperature difference.

> 3.  These two balloons are the same size and are filled with the same 
> amount of helium.  Which will rise faster on a sunny day?
> 	a.  black balloon
> 	b.  white balloon
> 	c.  both at the same rate

My guess would be a), much like adding hot air balloon effects.


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| Doug Craigen                                                 |
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| If you think Physics is no laughing matter, think again .... |
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