Recent content by ooohffff

  1. O

    Delete 'F', 'E', 'V' from 2-3 Tree

    Homework Statement (P) / \ (F) (U) / \ / \ (D, E) (J, O) (T) (V) Given the 2-3 tree, delete F E V from the tree in the given order. Show the tree after each deletion. Homework Equations Min = 1 Max = 2 The Attempt at a...
  2. O

    Sunlight, Intensity, electric field RMS

    Thanks! I got it right :)
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    Estimate the radiation pressure

    Great thanks!
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    Estimate the radiation pressure

    Would the equation be: Prad = I / c ? Plugging stuff in, this is what I get: c = 1/√(μoεo) I = P/ (SA) Prad = P / ( (SA)*c ) = 100W/ (4π(.08)2*c) = 4.15*10-6 Pa F= (4.15*10^-6 Pa) * (.0001 m2) = 4.15*10-10 N
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    Sunlight, Intensity, electric field RMS

    Homework Statement Estimate the rms electric field in the sunlight that hits Uranus, knowing that the Earth receives about 1350 W/m2 and that Uranus is 19.2 times farther away from the Sun (on average) than is the Earth. Homework Equations I=cεoErms2 E=V/d The Attempt at a Solution Eearth=V/d...
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    Estimate the radiation pressure

    Homework Statement a) Estimate the radiation pressure due to a 100 W bulb at a distance of .08 m from the center of the bulb. b) Estimate the force exerted on your fingertip if you place it at this point. (Assume an area of .0001 m2 for the fingertip.) Homework Equations F=PradA The Attempt...
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    That is the exact phrasing of the question. That phase angle, according to the formula that I used, should be the angle between voltage and current, not impedance and current. tanΦ = (VL-VC )/ VR = (XL - XC)/ R
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    Ah I figured out the problem! My original answer in this post -89.5° was correct. The mistake I made was that I should not have converted it to 270.48°, since technically φ should be negative since XC > XL, and you should generally take the smaller angle of the angles between two vectors.
  9. O

    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    Yup. That was the first one I tried with the equation: φ = cos -1 (R/Z) = 89.52028539° Yes, maybe I should try with more sig figs.
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    I've tried that before initially but that angle was also incorrect.
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    But then the resulting angle would be at 89.5°?
  12. O

    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    I just derived this because I don't think I know what you're talking about or I'm misguided, but I got tan-1 (cotφ)
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    Would you break it into components like: I = (40/(Zcosφ)) i + (40/(Zsinφ)) j and then find the angle of I?
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    Would it be tan φ = (VL - VC) / Z ? If not then I'm thoroughly confused.
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    What is the Phase Angle of an LRC Circuit with Given Components and Frequency?

    Ohm's law I=V/Z ?