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  1. X

    Initial velocity be larger or smaller once its calculated?

    If the pendulum is too long and the ball hits the top of the catcher really hard before imbedding itself in the catcher, will intial veloctiy be larger or smaller once its calculated?
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    Would the actual velocity be larger/smaller?

    I was wondering if the bearing is too tight, how would the initial of the ball be affected during a momentum collision? Would the actual velocity be larger/smaller?
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    Vector Components

    Homework Statement A plane flies from base camp to lake A, a distance of 280km, at a direction of 20 degrees north of east. After dropping thr supplies, it flies to lake B which is 190km and 30 degrees west of north from lake A. Determine the distance and direction gtom lake B to the base...
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    Uncertaninity Numbers

    Are the irregularities of the either object close to or greater than the uncertainty of the ruler?
  5. X

    SIg Figs

    do the densities of the cylinder/wire have the same number of dig figs? if u round up the densities of the one that has more significant figures to have the same number of significant figures of the other, are they different?
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    Different due to the mass of the object

    If the cylinder and wire are made of the same material, then their densities should be the same or different? I think its different due to the mass of the object
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    RLC Circuit

    Inductor since The instantaneous voltage across the inductor VL leads the instantaneous current by 90 degrees. Is that the reason?
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    RMS Voltage across capacitor

    Homework Statement The inductance is 0 in the RLC Circuit. the rms voltage across the genreator and the resistor are 45, and 24V. Wats the voltage across the capacitor? Homework Equations Vrms= Vmax/ Sq rt 2 V c = IX c , The Attempt at a Solution V= I/R I= V/R 24/45= 8/15A...
  9. X

    Snell's Law and critical angle

    Homework Statement The critical angle of a certain plastic in air is 37.3 degrees. Wats the critical angle of the same plastic if its immersed in water? Homework Equations n1sin( theta)= n2sin(theta) The Attempt at a Solution Nair= 1.00 1.00sin37.3/1.33 = sin(theta) sin(theta)=...
  10. X

    How far is the object from the mirror and what is the curvature?

    so base on what was corrected the answer is -1/15cm is how far is the image from the mirror, and what is the radius of curavature of the mirror is f= r/2 r=f*2 -1/15*2= -2/15cm?
  11. X

    RLC Circuit

    1. if a impedance at 192 ,phase angle -75, resistor 49.7, wat missing in this circuit? A inductor or capacitor? Can it be a inductor?
  12. X

    Sigle slit

    do i inverse sin 2.10 E -3? i'm nto quick sure what to do?
  13. X

    How far is the object from the mirror and what is the curvature?

    Homework Statement An object is placed 15cm from a certain mirror, the image is half the size of the object, upright, and virtual. how far is the image fromt he mirror, and what is the radius of curavature of the mirror? Homework Equations 1/f = 1/p + 1/q f= r/2 The Attempt at a...
  14. X

    Sigle slit

    Homework Statement A laser 632.8nm is sent through a single slit of widith 0.30 mm. Wats the width of the central maximum on a screen 1.0m in the back of the slit? Homework Equations asin(theta) = m lamda The Attempt at a Solution lamda: 632.8nm 0.30 mm= 3.0 x 10^-4 m...
  15. X

    Young's double slit experiment decreasing distance

    what the advantage of decreasing the distance between slits in a Young double slit experiment? i think to have the laser move closer to the screen
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    AC Circuit

    I dont understand when you have an AC Circuit that has a coil, capacitor and resistance. What factor will the resonant frequency change when the frequency is tripled?
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    Induced EMF

    Homework Statement A 11.2m long steel been is dropped from a height of 9.51m. The horizontal component of the earth's over the region is 18.5x10^-6T. What's the emf in the beam impact just before the impact with the earth, assuming its long dimension remains in a horizontal plane, oriented...
  18. X

    How fast must the rotor of a generator rotate?

    i did, but ur not given enough info to solve it, when u have E=-N ( magnetic flux)/ time or motion emf which is E= Blv
  19. X

    How fast must the rotor of a generator rotate?

    Homework Statement The maximum indicued emf in a generator is 205rpm is 43.0V. How fast must the rotor of the generator rotate if it's to generate a maximum inducded emf of 55.0V? Homework Equations E= NBAsinwt The Attempt at a Solution 205r/m*2 (Pi)/ 1rev81min/60s = 21.46rad/s magnet...
  20. X

    RL Circuit Discharge and RCL Circuit

    In the RL Circuit Discharge and RCL Circuit, if you had only measured the resistance of your resistor and not taken into account the resistances in the inductor and function generator, how would this affect the calculated inducted from the half life measurement?
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    RCL Circuit Lab

    Homework Statement I'm trying to find the inductor RL Circuit: Resistor (22Ω), Inductor , Function Generator Resistance (Ω): 24.7 Ω 50 RL Circuit Half-Life: 64.00µs RLC Circuit, Resonance: Resistor (1000Ω), Inductor , Function Generator...
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    Check Potential Difference

    v= 19826.67 is that the potential difference?
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    Check Potential Difference

    i did it and got 2.10E -3 V and its its in μf
  24. X

    Check Potential Difference

    if PE is 91.02 and the equation is W= 1/2 *C*V sq then 910/2 * 4.63x10-6= then sq root then to 9913.33
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    Check Potential Difference

    Homework Statement A 4.63mF capacitor has stored energy to heat 3.00kf of water from 22 degrees C to 94.5 degrees C. What the potential difference? Homework Equations Q= mC delta T W= Q sq/2C V=W/C The Attempt at a Solution Q= mC delta T Q= 3kg* 4.184* ( 94.5-22) = 910.02 J...
  26. X

    Whats the average current does this rotating charge represent

    116 pi rad/ sec * 60secs/1 min* 1rev/2pi rad
  27. X

    Help with series combinations

    Homework Statement a series combinations is 11.6k ohms resistor and an unknown capacitor is connected to the a 180 V battery. One second after the circuit is completed, the voltage across the capacitor is 16.8v. determine the capacitance of the capacitor? Homework Equations V=18 C...
  28. X

    Whats the average current does this rotating charge represent

    Current is I (amps) where its charge(Q) / (t) times in secs. so 116/60?, is it 8.34x1e-9/ (116 pi/60)?
  29. X

    Whats the average current does this rotating charge represent

    Homework Statement a small sphere carries a charge of 8.34nC in whirled in a circle at the end of an insulating string. The angular speed is 116 Pi rad/s. whats the average current does this rotating charge represent Homework Equations I= q/t w= theta/t The Attempt at a Solution...
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