A capacitor with C=1 pF is charged, showing a voltage of 1 V. In order to discharge it, an ohmic resistor of 5 MW is used. How long does it take until 100,000 electrons have left the capacitor?
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- rotating at 50 rad/s. It must be brought to stop in 10 s A flywheel of moment of inertio 16 S. (ii) What is the required average power?. If a trapeze artist rotates twice each second while sailing through the air and contracts to reduce his rotational inertia to one-third of what it was, how many rotations per second will result?Do it properly.. Will upvote you.
- 16-146. A ride in an amusement park consists of a rotating arm AB that has an angular acceleration of aдB = 1 rad/s² QAB when @AB = 2 rad/s at the instant shown. Also at this instant the car mounted at the end of the arm has an angular acceleration of a = {-0.6k) rad/s² and angular velocity of w' (-0.5k) rad/s, measured relative to the arm. Determine the velocity and acceleration of the passenger C at this instant. = w' = 0.5 rad/s 10 ft 60° y WAB = 2 rad/s 30° x Probs. 16-145/146 B 2 ft(II) A uniform disk turns at 3.3 rev/s around a frictionless central axis. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk, Fig. 8–56. They then turn together around the axis with their centers superposed. What is the angular frequency in rev/s of the combination? FIGURE 8-56 Problem 72.What is rotational non-impulse?