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    <title>Science Group at eNotes</title>
    <link>http://www.enotes.com/science/group</link>
    <description>The latest discussion, including questions and answers, from the Science Group at eNotes.</description>
    <lastBuildDate>Sat, 4 Jul 2009 08:42:49</lastBuildDate>
    <language>en-us</language>
    <item>
        <title><![CDATA[The magnetic field from wire one  is: B = uI1/2PIr. For electrons moving...]]></title>
        <link>http://www.enotes.com/science/q-and-a/two-long-rectilineal-conductors-parallel-between-90767</link>
        <description><![CDATA[The magnetic field from wire one  is: B = uI1/2PIr. For electrons moving in wire two, the differential force along dL of the wire felt at distance r is F = I2*dL*B = u*I1*I2*dL/2PIr
Work is Int(F dr), so W = Int(u*I1*I2*dL/2PIr dr) = (u*I1*I2*dL/2PI)*Int(1/r dr) = K*Int(1/r dr)
Recalling that Int(1/r dr) = ln(r), the work done moving the wires from 4 cm separation to 8 cm separation is K*ln(8cm/4cm).
So W/dL = (u*I1*I2/2PI)*ln(2)]]></description>
        <guid>http://www.enotes.com/science/q-and-a/two-long-rectilineal-conductors-parallel-between-90767</guid>
        <pubDate>Sat, 4 Jul 2009 08:42:49 PST</pubDate>
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    <item>
        <title><![CDATA[why cans of chesse swap after processing   ]]></title>
        <link>http://www.enotes.com/science/q-and-a/why-cans-chesse-swap-after-processing-90789</link>
        <description><![CDATA[why cans of chesse swap after processing   ]]></description>
        <guid>http://www.enotes.com/science/q-and-a/why-cans-chesse-swap-after-processing-90789</guid>
        <pubDate>Sat, 4 Jul 2009 08:37:05 PST</pubDate>
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        <title><![CDATA[A coil made of wire of copper, with wire's diameter d, traversed by a...]]></title>
        <link>http://www.enotes.com/science/q-and-a/coil-made-wire-copper-with-wires-diameter-d-90775</link>
        <description><![CDATA[A coil made of wire of copper, with wire's diameter d, traversed by a current I, is coaxial set into a magnetic field.]]></description>
        <guid>http://www.enotes.com/science/q-and-a/coil-made-wire-copper-with-wires-diameter-d-90775</guid>
        <pubDate>Sat, 4 Jul 2009 06:29:59 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[A disc is radial crossed, through sliding contacts, by an electrical...]]></title>
        <link>http://www.enotes.com/science/q-and-a/disc-radial-crossed-through-sliding-contacts-by-90771</link>
        <description><![CDATA[A disc is radial crossed, through sliding contacts, by an electrical current I=4A. The disc is set perpendicullar on a magnetic field, B=20mT.]]></description>
        <guid>http://www.enotes.com/science/q-and-a/disc-radial-crossed-through-sliding-contacts-by-90771</guid>
        <pubDate>Sat, 4 Jul 2009 06:20:56 PST</pubDate>
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    <item>
        <title><![CDATA[Two long rectilineal conductors, parallel between them, have the...]]></title>
        <link>http://www.enotes.com/science/q-and-a/two-long-rectilineal-conductors-parallel-between-90767</link>
        <description><![CDATA[Two long rectilineal conductors, parallel between them, have the distance between them of r=4 cm.An electrical current passes through both of them.]]></description>
        <guid>http://www.enotes.com/science/q-and-a/two-long-rectilineal-conductors-parallel-between-90767</guid>
        <pubDate>Sat, 4 Jul 2009 06:10:01 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[An electrical current is going through a circular coil. The coil is...]]></title>
        <link>http://www.enotes.com/science/q-and-a/an-electrical-current-going-through-circular-coil-90765</link>
        <description><![CDATA[An electrical current is going through a circular coil. The coil is input partially in a region with magnetic field.]]></description>
        <guid>http://www.enotes.com/science/q-and-a/an-electrical-current-going-through-circular-coil-90765</guid>
        <pubDate>Sat, 4 Jul 2009 05:59:02 PST</pubDate>
    </item>
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        <title><![CDATA[A bed of several nails are more comfortable than one single nail.Ask the...]]></title>
        <link>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</link>
        <description><![CDATA[A bed of several nails are more comfortable than one single nail.Ask the person to stand one or two or just not more than 3 pins to make show!
Pressure is the weight force  divided  by the area on which the body rests. The more the area of the weight force is spread over , you feel more comfotable.
Pressure per unit area reduces if the weight force is distributed over a larger area, larger number of pins.
On the other hand you consider the...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</guid>
        <pubDate>Sat, 4 Jul 2009 05:36:57 PST</pubDate>
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    <item>
        <title><![CDATA[The primary reason why a person can lay on a bed of nails and not...]]></title>
        <link>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</link>
        <description><![CDATA[The primary reason why a person can lay on a bed of nails and not experience physical pain (but emotional fear) is the same reason why  high heeled shoes are a hardwood floor worker’s worst nightmare.  When hardwood floors are placed down for the first time, you will be warned to not let someone with high heeled shoes walk on them for a couple of days.  They will even say that you can let an elephant walk on the floors, but not someone...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</guid>
        <pubDate>Sat, 4 Jul 2009 04:53:57 PST</pubDate>
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        <title><![CDATA[Whether or not a nail will pierce human body depends on sharpness of the...]]></title>
        <link>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</link>
        <description><![CDATA[Whether or not a nail will pierce human body depends on sharpness of the nail as well as the pressure with which the pin presses against the body. When a parson lies on on a bed of nails having hundreds without getting hurt by nails, he takes care to ensure that the total wight of the body is resting on a very large number of pins. Thus, for example, if a person weighing 60 kilograms is resting on 1200 nails, the average weight on each nail is...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</guid>
        <pubDate>Sat, 4 Jul 2009 02:38:15 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[Why is it that a person can lie down on a bed of nails unharmed?]]></title>
        <link>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</link>
        <description><![CDATA[Why is it that a person can lie down on a bed of nails unharmed?]]></description>
        <guid>http://www.enotes.com/science/q-and-a/why-that-person-can-lie-down-bed-nails-unharmed-90759</guid>
        <pubDate>Sat, 4 Jul 2009 01:11:20 PST</pubDate>
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        <title><![CDATA[C programming can be a powerful tool for many diverse fields of science....]]></title>
        <link>http://www.enotes.com/science/q-and-a/what-importance-c-programming-engineering-fields-90061</link>
        <description><![CDATA[C programming can be a powerful tool for many diverse fields of science. As for engineering c programming is just a "must."
When you go to college and major in engineering you will probably take programming courses as much as your major courses (with a bit of exaggeration).
Some people actually do a minor in computer science just so that they can be better with their actual major.
The reason why C programming is important is because it allows...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/what-importance-c-programming-engineering-fields-90061</guid>
        <pubDate>Fri, 3 Jul 2009 19:57:24 PST</pubDate>
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    <item>
        <title><![CDATA[The three types of volcanoes are shield, composite, and cones.  Of the...]]></title>
        <link>http://www.enotes.com/science/q-and-a/what-3-types-volcanoes-90745</link>
        <description><![CDATA[The three types of volcanoes are shield, composite, and cones.  Of the three, the composite is the worst.  The distinctions are as follows:

SHIELD VOLCANOES This type has a slope that is small, seems flat. This usually has flowing, seeping lava that does not shoot out in the air The lava flow is very slow and you could outrun it This type makes large chunks of basalt
Hawaii and Oregon feature Shield volcanoes.
 
CINDER CONES This has the...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/what-3-types-volcanoes-90745</guid>
        <pubDate>Fri, 3 Jul 2009 18:10:43 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[what are the 3 types of volcanoes ?]]></title>
        <link>http://www.enotes.com/science/q-and-a/what-3-types-volcanoes-90745</link>
        <description><![CDATA[what are the 3 types of volcanoes ?]]></description>
        <guid>http://www.enotes.com/science/q-and-a/what-3-types-volcanoes-90745</guid>
        <pubDate>Fri, 3 Jul 2009 17:31:36 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[The simple answer to your question, "What will happen..." is nothing...]]></title>
        <link>http://www.enotes.com/science/q-and-a/what-happens-air-that-included-prefilled-syringe-90531</link>
        <description><![CDATA[The simple answer to your question, "What will happen..." is nothing will happen.  The danger of the "air bubble" is not in intramuscular injections, the danger occurs if the injection is intravenous.  If too much air is injected into a vein or artery it can cause an "air embolism" or "gas embolism."  Most experts agree that even if you injected a whole syringe of air into your system it wouldn't do any harm.  It would take more air than a...]]></description>
        <guid>http://www.enotes.com/science/q-and-a/what-happens-air-that-included-prefilled-syringe-90531</guid>
        <pubDate>Thu, 2 Jul 2009 17:49:52 PST</pubDate>
    </item>
    <item>
        <title><![CDATA[Science Action Labs Air Science (Enhanced eBook)]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-air-science-enhanced-ebook-39723</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-air-science-enhanced-ebook-39723</guid>
        <pubDate> PST</pubDate>
    </item>
    <item>
        <title><![CDATA[Science Action Labs Sound & Light]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-sound-light-39737</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-sound-light-39737</guid>
        <pubDate> PST</pubDate>
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    <item>
        <title><![CDATA[Science Action Labs Sound & Light (Enhanced eBook)]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-sound-light-enhanced-ebook-39739</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-sound-light-enhanced-ebook-39739</guid>
        <pubDate> PST</pubDate>
    </item>
    <item>
        <title><![CDATA[Science Action Labs Water Science]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-water-science-39725</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-water-science-39725</guid>
        <pubDate> PST</pubDate>
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    <item>
        <title><![CDATA[Science Action Labs Water Science (Enhanced eBook)]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-water-science-enhanced-ebook-39727</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-water-science-enhanced-ebook-39727</guid>
        <pubDate> PST</pubDate>
    </item>
    <item>
        <title><![CDATA[Science Action Labs Air Science]]></title>
        <link>http://www.enotes.com/documents/science-action-labs-air-science-39721</link>
        <description><![CDATA[]]></description>
        <guid>http://www.enotes.com/documents/science-action-labs-air-science-39721</guid>
        <pubDate> PST</pubDate>
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