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  1. J

    Find power when resistor, capacitor, and inductor are connected in a series

    Homework Statement When a resistor is connected by itself to an ac generator, the average power delivered to the resistor is 0.952 W. When a capacitor is added in series with the resistor, the power delivered is 0.477 W. When an inductor is added in series with the resistor (without the...
  2. J

    Find ratio of two charges

    Homework Statement The drawing shows two positive charges q1 and q2 fixed to a circle. At the center of the circle they produce a net electric field that makes an angle 28.6° with the vertical axis, measured counterclockwise. Determine the ratio q2/q1. [the drawing shows a circle with two...
  3. J

    Doppler Effect Stationary Source/Observer on a Spring

    Didn't even notice that, I haven't thought about differentiation (or calculus) in a few semesters :)
  4. J

    Sound of overhead plane is heard in the distance

    I feel like this may be a silly question, but I am not sure what to use in the kinematic equations for acceleration? I know that acceleration is constant but I don't know what to use for its value.
  5. J

    Doppler Effect Stationary Source/Observer on a Spring

    Thank you so much! I just subtracted the min frequency from the max and set it equal to 1.83 Hz. I did, however, use the v(max)=Aω to find the amplitude, but versus time the other equation would have worked better. :)
  6. J

    Sound of overhead plane is heard in the distance

    No distances are given. The only given data is velocity at point A, θ=36.0, and the speed of sound. I know the answer is 237 m/s, but I have no idea how to get there.
  7. J

    Find the distance between objects and sound source

    I have L1^2 + (1.21)^2 = (L1 + .57114)^2 and I can't seem to move the algebra around to get the right answer for L1. I know that (from the book) L1= .996m and L2= 1.57m, but I never arrive at the right answer. Am I missing a step or just getting the algebra wrong?
  8. J

    Sound of overhead plane is heard in the distance

    Homework Statement A jet is flying horizontally [drawing shows an observer on the ground, a plane overhead at point B, and an outline of the plane from it's observed position to the left at point A. The angle between the observer and point A is 36°.] When the plane is directly overhead at B, a...
  9. J

    Doppler Effect Stationary Source/Observer on a Spring

    Homework Statement A microphone is attached to a spring that is suspended from the ceiling. Directly below on the floor is a stationary 540-Hz source of sound. The microphone vibrates up and down in simple harmonic motion with a period of 2.20 s. The difference between the maximum and minimum...
  10. J

    Find the distance between objects and sound source

    Homework Statement One microphone is located at the origin, and a second microphone is located on the +y-axis. The microphones are separated by a distance of D= 1.21m. A source of sound is located on the +x-axis, its distance from microphones 1 and 2 being L1 and L2, respectively. The speed of...
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