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Two waves A and B, both of wavelength λ = 51.7-cm, are initially out of phase by π. I want to bring them back in phase by placing some mirrors along the path of wave B as shown in the figure. What is the minimum spacing L required to achieve this?
An inductor has an inductance of 0.069 H. The voltage across this inductor is 56 V, What is the current in the inductor
What is the speed of a 1 MHz radio wave in water (n=1.333)? What is its wavelength in the water
A wheel with rotational inertia 1.27 kg m2 is rotationwith an angular speed of 824 rev/min on a shaft whose rotationalinertia is negligible. What fraction of the original kinetic energy is lost
A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.8 x 10^4 rev/min, Determine the angle (in radians) through which the drill rotates during this period
The coil wand pendulum starts swinging with an angle of 30 degrees with the vertical. After it passes through the magnetic gap, What is the energy lost by the pendulum
A 275 ball is tied to a string. It is pulled to an angle of 4 and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 20.
A 5 kilogram solid disk has a radius of 0.25 m and rotates at120 revolutions per minute. Evaluate the rotational kinetic energy of the disk in SI units
during a lightning flash there exists a potential difference of vcloud - vground 1.7 x 109 v between a cloud and the
Light from a hydrogen discharge passes through a diffraction grating and registers on a detector 1.5 m behind the grating. find the position of the second member of the Paschen series
a pendulum is made of a uniform stick of length l. it is allowed to swing in a vertical plane. where should the pivot
A copper bar is moved to the right while its axis is maintained in a direction perpendicular to a magnetic field, what is the direction of the magnetic field
A spherical water drop 1.20μ m in diameter issuspended in calm air owing to a downward-directed atmosphericelectric field E = 442 N/C. What is the weight of the drop
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