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Cord Socket Bulb
Will a fluorescent light bulb work if the hot and the common wires are backwards?
My brother is putting a light socket on the end of an extension cord and he can't tell which wire is which because they are both the same color. I'm almost positive it will work with an incandescent light bulb if they are backwards but will it work with a fluorescent light bulb?
yes but not ideal
Electricity and Water DO mix!!!
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Doubling Linear Dimension...?
If every object on earth doubled it linear dimension,
(A) Does an electrical cord from the wall socket have more, less, or the same resistance as before? Explain.
(B) Does a light bulbs glow more brightly, less, or the same? Explain.
(Assume that the resistivities of objects are unchanged)
a) it's twice as long, which doubles the resistance. But the diameter doubles, which makes the cross-sectional area go up by a factor of 4.
Resistance of a wire in Ω
R = ρL/A
ρ is resistivity of the material in Ω-m
L is length in meters
A is cross-sectional area in m²
A = πr², r is radius of wire in m
that means the resistance changes by x2 x1/4 or total by 1/2
b) using the same reasoning as (a) the resistance of the filament will be half what it was so the current will be twice, and power will be twice, and it will be brighter, for a brief while until it burned out. That assumes the voltage doesn't change, but it probably does.
.
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Gardening Kit Cherry
Which grow light should work best?
This would be for a youngish brush cherry bonsai that needs some extra light (it's winter and we are in MN.)
Fertile Earth LiteStik http://www.amazon.com/Fertile-Earth-LiteStik-General-House/dp/B002NU5ACS/ref=sr_1_5?ie=UTF8&s=home-garden&qid=1298149912&sr=1-5
BonsaiBoy light http://www.amazon.com/Bonsai-Boys-Grow-Light-Kit/dp/B002C6DTGW/ref=sr_1_4?ie=UTF8&s=home-garden&qid=1298150375&sr=1-4
Any other desktop light suggestions that are reasonably priced?
Anything will a good reflective barrier will work, the second option looks like a good go.
Meteor Garden (Canada)
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3 Flora Series Quart FloraMicro FloraGrow FloraBloom |  |
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General Hydroponics Flora Bloom FloraBloom - 1 Quart | |
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GLN Bloom Hydroponics Nutrient florabloom general flora | |
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General Hydroponics FloraBloom 1 Quart | |
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GENERAL HYDROPONICS 32 oz FLORABLOOM 1 QT flora bloom quart | |
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GH FLORA SERIES NUTRIENTS - FLORABLOOM QUART (0-3-4) | |
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GENERAL HYDROPONICS FLORABLOOM 1 QUART | |
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Florabloom Quart
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3 Flora Series Quart FloraMicro FloraGrow FloraBloom | |
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US $35.59 | 25d 7h 3m |
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General Hydroponics Flora Bloom FloraBloom - 1 Quart | |
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US $14.74 | 24d 10h 16m |
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GLN Bloom Hydroponics Nutrient florabloom general flora | |
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US $9.00 | 29d 6h 39m |
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General Hydroponics FloraBloom 1 Quart | |
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US $22.95 | 27d 22h 33m |
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GENERAL HYDROPONICS 32 oz FLORABLOOM 1 QT flora bloom quart | |
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US $19.88 | 27d 9h 13m |
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FloraBloom 1 Quart Nutrient General Hydroponics | |
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US $19.99 | 27d 8h 34m |
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General Hydroponics FloraBloom 1 Quart 32oz Flora Bloom | |
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US $14.75 | 5d 11h 39m |
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Lucas Formula Bloom Micro Hydroponics general flora florabloom floramicro | |
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US $9.00 | 6d 2h 37m |
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General Hydroponics FloraBloom 1 quart | |
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US $9.95 | 21d 5h 1m |
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GH FLORA SERIES NUTRIENTS - FLORABLOOM QUART (0-3-4) | |
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GENERAL HYDROPONICS FLORABLOOM 1 QUART | |
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US $12.25 | 3d 3h 18m |
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Sentinel VCG-6LP LP CO2 Generator Liquid Propane Burner Hydroponics | |
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Sentinel VCG-27 LP CO2 Generator Propane Burner Hydroponics High Altitude | |
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Sentinel VCG-27 LP CO2 Generator Propane Burner for Hydroponics Greenhouse | |
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Propane Hydroponics
PROPANE "Grillin' At The Stoned Crow"
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Sentinel VCG-6LP LP CO2 Generator Liquid Propane Burner Hydroponics | |
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Sentinel VCG-6LP LP CO2 Generator Liquid Propane Burner Hydroponic High Altitude | |
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Sentinel VCG-27 LP CO2 Generator Propane Burner Hydroponics High Altitude | |
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US $632.35 | 29d 2h 37m |
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Sentinel VCG-27 LP CO2 Generator Propane Burner for Hydroponics Greenhouse | |
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US $632.35 | 29d 2h 34m |
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