|
|
| Author |
Message |
| 10 new of 98 responses total. |
keesan
|
|
response 89 of 98:
| 
Feb 7 01:08 UTC 2003 |
Jim says 'Yes' that answers his question. Now he wants me to help him set
up a database that will be used to record temperature, humidity, and electric
meter reading at various times of day, week and month, in DOS. (We are not
very far into Linux yet). Or maybe it should be a spreadsheet program. He
wants averages and graphs but also to be able to sort and filter. Are there
programs that do all this? I suggested finding programs that will import and
export text-format files (a pair of programs that you can move data between).
He wants to plot and calculate and see how it depends on time of day and
presence of housemates. Ideas?
|
rcurl
|
|
response 90 of 98:
|
Jan 8 06:48 UTC 2006 |
An hollow metal box that weighs 20 pounds is 1 foot on a side and hence
has a total (external) volume of 1 cubic foot. It is placed on the bottom
of a tank and then welded to the bottom completely around all four bottom
edges. The tank is then filled with water to a depth of two feet. With
what force is the box pulling upon the floor of the tank because of its
bouyancy?
|
sholmes
|
|
response 91 of 98:
|
Nov 20 02:29 UTC 2009 |
What is more ecologically damaging- using 2 styrofoam cup daily or using water
and soap to wash a steel cup twice daily ? Similarly are electric cars more
environment friendly, if the electricity used to charge the batteries was
generated by say a coal fired power plant ?
|
keesan
|
|
response 92 of 98:
|
Nov 20 02:48 UTC 2009 |
A coal fired plant is far less polluting than a gasoline engine because you
can clean the fumes at the source with larger and more efficient equipment,
also the fumes are generated away from where people are walking around.
I think electricity generation is also more efficient than gasoline engines
but you do lose something in transmission.
|
rcurl
|
|
response 93 of 98:
|
Nov 20 06:01 UTC 2009 |
Re #90: No one has been able to solve that problem in over 3.5 years?!
Re #91: Sindi is right about electricity. Its generation in a combined
cycle gas turbine (CCGT) plant is ca. 60% efficient, nearly twice that
of internal combustion engines. Also, it is more environmentally
friendly using natural gas.
|
keesan
|
|
response 94 of 98:
|
Nov 20 16:47 UTC 2009 |
Cars can also run on natural gas, which is less polluting.
|
rcurl
|
|
response 95 of 98:
|
Nov 20 21:12 UTC 2009 |
If you can find a natural gas station....
|
keesan
|
|
response 96 of 98:
|
Nov 20 21:40 UTC 2009 |
On Hiscock St. near the garbage yard.
|
rcurl
|
|
response 97 of 98:
|
Nov 21 06:23 UTC 2009 |
Where else?
"Natural gas rises as viable fuel, but lack of infrastructure could
prevent use in consumer vehicles"
"Michigan has 13 compressed NG stations open to the public."
http://is.gd/50aKG
|
tod
|
|
response 98 of 98:
|
Jan 1 00:03 UTC 2010 |
I wonder how much acid rain would be welcome if it meant more ozone
|