Recent content by shimizua

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    Angle of incidence, angle of refraction and angle of reflection

    Homework Statement A light ray strikes the surface between two transparent materials as shown. Each angle is labeled with a letter. Give the letters for the angle of incidence, angle of refraction and angle of reflection, in that order Homework Equations...
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    Square Loop Of Wire True or False

    Please someone help me
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    Square Loop Of Wire True or False

    Homework Statement A square loop of wire with a small resistance is moved with constant speed from a field free region into a region of uniform B field (B is constant in time) and then back into a field free region to the right. The self inductance of the loop is negligible...
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    What is the potential difference between points a and b?

    ok well i don't remember how to find B with what is given to me. sorry. if you can just give me some equations i can do the work. not asking for u to do the work for me
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    What is the potential difference between points a and b?

    Homework Statement A 1000-turn loop (radius = 0.037m) of wire is connected to a (20 Ohm) resistor as shown in the figure. A magnetic field is directed perpendicular to the plane of the loop. The field points into the paper and has a magnitude that varies in time as B=gt, where g=0.25 T/s...
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    Calculate the current i3 in the following configuration

    nm, i figured it out
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    Calculate the current i3 in the following configuration

    Homework Statement Calculate the current i3 in the following configuration: http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype57/prob06_kirch.gif EMF_1 = 6 V EMF_2 = 3 V R_1 = 70 Ohm R_3 = 20 Ohm Homework Equations I know that V=IR so I=V/R but because there are 2...
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    Resistance Between Terminals AC and AD

    Homework Statement What is the resistance between terminals AC? What is the resistance between AD? An underground telephone cable, consisting of a pair of wires, has suffered a short somewhere along its length (at point P in the Figure). The telephone cable is L long, and to determine...
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    Calculate Resistance of 43m Copper Wire

    Homework Statement A number 16 copper wire has a diameter of 1.291mm. Calculate the resistance of a 43m long piece of such wire. Use rho=1.72x10-8 Ohm-m for the resistivity of copper. Use units of "ohm". Homework Equations R=pl/A rho is the same thing as the p The Attempt at a...
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    Solving Charge Accumulated from Scuffing Feet: Magnitude of Force

    you do k(charge of how many she accumulated)(charge of electron)/r^2
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    What is the the electric field at a point midway between

    sorry it took so long, i had a class. it would be .0187 not .00187. that is probably why. does that work now?
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    What is the the electric field at a point midway between

    um...ya. so i just divided the r by 2. but u still have to make sure you are squaring it? post up ur numbers and stuff and what you get if you are still having trouble and ill see if i can help you out
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    What is the magnitude of the charge on each particles

    In the previous problem, what is the magnitude of the charge on each particle? the previous problem was Two point-like particles are placed 14.8 cm apart and are given equal and opposite charge. The first particle, of mass 41.0 g, has an initial acceleration of 1.40 m/s2 towards the second...
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    What is the magnitude of the electric field

    Never mind I got it. i was using the right equation, lol i guess i did just enter a number in wrong. funny cause i did it like 10 times. thanks though tiny-tim
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    What is the magnitude of the electric field

    k so i did E=54.1E-6/4*3.14*8.85E-12*4.01^2 and got 2.7E4 N/C which still was wrong. what else did i do wrong?