Recent content by blueskadoo42

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    Two Infinite Non-Conducting Planes

    anyone? i don't know which field to add or subtract. any help?
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    Two Infinite Non-Conducting Planes

    bump!
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    Two Infinite Non-Conducting Planes

    Homework Statement The electric field equals 19j for points above plane 'r', -31j between the planes, and -19j below plane 's', where j is the unit vector in the +y direction and the fields are in V/m. Calculate σr, the suface charge density for plane 'r'. positive y- straight up positive...
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    Electric field and charge enclosed

    so one will be positive integral of EdA and one will be a negative integral of EdA. wouldn't those just cancel??
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    Electric field and charge enclosed

    the cube is along the axes. imagine the origin, then having x-point to your left, y-point to your right and z-point straight up. but I am not sure how to integrate this problem..
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    How Much Ice Melts to Lower Water Temperature from 24°C to 5°C?

    anyone?
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    How Much Ice Melts to Lower Water Temperature from 24°C to 5°C?

    Homework Statement How much ice (in grams) would have to melt to lower the temperature of 351 ml of water from 24 deg C to 5 deg C? (Assume the density of water is 1.0g/ml .) Homework Equations q=mc(deltaT) The Attempt at a Solution m=351 g c=4.18J/g*C deltaT=19deg C...
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    Electron Motion Near Nucleus: Calculating Period and Velocity

    bump!
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    Electron Motion Near Nucleus: Calculating Period and Velocity

    bump!
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    Electron Motion Near Nucleus: Calculating Period and Velocity

    Homework Statement What is the magnitude of the electric field at a distance of 5.00 ×10−10 m from a radon nucleus? =4.95×1011 N/C What is the magnitude of the force on an electron at that distance? =7.94×10-8 N Now here is where I am getting stuck.. Treating the electron classically...
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    What Is the Mass Percent Concentration of CaCl₂ in the Solution?

    ah right, almost forgot. Ill give this a run thanks.
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    What Is the Mass Percent Concentration of CaCl₂ in the Solution?

    alright knowing this, i use 'a' as the vap press for cacl2 and 'b' for vap press of water? then use molecular weights to to solve for total mass of solution..?
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    What Is the Mass Percent Concentration of CaCl₂ in the Solution?

    yeah i do. p = pa*xa+pb*xb correct? not sure how to solve for the x's...
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    What Is the Mass Percent Concentration of CaCl₂ in the Solution?

    % by mass concentration Homework Statement An aqueous CaCL2 solution has a vapor pressure of 80.8mmHG at 50 degree C . The vapor pressure of pure water at this temperature is 92.6 mmHG . What is the concentration of CaCl2 in mass percent? Homework Equations % by mass = mass solute/mass...
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    Finding location of nodes and antinodes.

    pi and 0? pi would be the one to choose. so set either equation? equal to pi and solve for t. that's is where I am getting tripped up at. which equation to use. does it make a difference because they have different phases?