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A small camera has a lens with focal length f=15 mm has a movable lens that can be focused on objects as close as 20 cm or as far away as infinity (relative to f).
a.) What is the optimum distance from lens to film if the camera is set for infinity (i.e., s>>f)?
b.) What is the optimum lens-film distance if s=20 cm?
Two circular coils of current-carrying wire have the same magnetic moment. The first coil has a radius of 0.094 m, has 134 turns, and carries a current of 3.8 A
A running back with a mass of 82 kg and a velocity of 9 m/s (toward the right) collides with, What is the velocity of the tackle before the collision
One of the harmonic frequencies of tube A with two open ends is 1020 Hz. The next-highest harmonic frequency is 1088 Hz. What is the number of this next-highest harmonic
Two 0.20-H inductors and one 0.44-H inductor are connected in series across the terminals of a 60.0-Hz ac generator. What is the total inductive reactance of this circuit
a 3.0E6 resistor is connected in series with an initailly uncharged 0.28E-6 F capacitor. What is the maximum current in the circuit and when does it occur
A long, straight wire runs along the y-axis. The wire carries a current in the positive y-direction that is changing as a function of time according to i = 8 A + (0.2 A/s)t. A loop of wire is placed in the xy-plane near the y-axis. The loop has di..
A flight attendant pulls her 63N flight bag a distance of 308m along a level airport floor at a constant velocity. The force she exerts is 45N at an angle of 57° above horizontal. Find the work she does on flight bag.
Force F = (6.0 N) i hat + (-9.0 N) k hat acts on a pebble with position vector r = (0.90 m) j hat + (-0.6 m) k hat, What is the resulting torque acting on the pebble about the origin
Determine the differential equation of motion for the damped oscillations and find the time (in term of M) it takes for the system to settle down to oscillations of only 25% of the initial amplitude; (4')
A 86 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 380N. What is the final speed of the crate
Two organ pipes play the same fundamental note (i.e., the same lowest frequency). Pipe A is open at one end and closed at the other. Find the ratio of the lengths of pipe B to pipe A
A transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected to a 11-V source. What is the voltage output of the secondary
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