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A uniformly charged plastic disk has a radius of 0.270 m. At what distance from the center along the central perpendicular axis is the magnitude of the electric field equal to one-half the magnitude of the field at the center of the surface of the disk?
The fundamental frequency of an open organ pipe corresponds to the middle C (261.6 Hz on the chromatic musical scale). The third resonance of a closed organ pipe has the same frequency. (Assume that the speed of sound in air is 343 m/s.) What is the ..
A car (m1 = 900) moving south with a speed v1 = 25 collides with a truck (m2 = 1500) moving at an angle of 30 degrees south of west with a speed v2= 20. What is the magnitude and direction of their final velocity
While riding her bicycle on a 140 meter track, a rider took 18 seconds on her first lap and 17 seconds on her second
A transformer consisting of two coils wrapped around an iron core is connected to a generator and a resistor, What is the peak emf of the generator?
Wishing to move his television set to another room, the owner extends the aerial feeder cable, calculate the size of the signal transmitted across the join to the second cable
Two high-current transmission lines carry currents of 27.0 A and 80.0 A in the same direction and are suspended parallel to each other 35.0 cm apart. what magnetic force does each segment exert on the other
A 2m long pendulum with a mass of 250gr collides with a 95gr sticky ball seating in the pendulum's path and at the edge of a horizontal surface. The collision takes place while the pendulum is passing by its lowest point.
Train car 1 has a mass of 6.5 x 10^4 kg and is sitting stationary on a track. Train car 2, with a mass of 9.30 x 10^3 kg, What is the speed of Train car 1 after the collision
Observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central supermassive black hole at a speed of 200 km/s
If a heat engine is operating at a coefficient of performance of 2.50 and 3.00 J of heat is absorbed from the surroundings, determine the magnitude of heat expelled.
a 1cm high object is placed 20cm to the left of a converging lens f(focal length)=10cm. where is the final image and how high is it
A Heliun-Neon laser illuminates a narrow, single slit that is 1850 nm wide. Determine the wavelength of the light from the laser
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