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A farsighted person uses glasses with a refractive power of 3.5 diopters. The glasses are worn 2.7 from his eyes. What is this person's near point when not wearing glasses?
The treasure map in the figure gives the following directions to the buried treasure, Which direction should you go to reach the treasure and How far should you go to reach the treasure
Light of a wavelength of 661.1 nm is received from a star that is emitting light of wavelength of 659.6 nm. How fast is the star moving relative to the earth
A gymnast performing a routine on the high bar feels weightless at the highest point of their rotation. Why does the gymnast feel weightless at the highest point of their rotation around the bar? What is the cause of this phenomenon
The light then passes through an analyzer at an angle of 22.5º to the polarizer. What is the intensity of light leaving the analyzer
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
A metal rod of mass 50 and electrical resistance 0.10 rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance = 10.0 apart. The rails are also connected to the voltage source providing a voltage of = 5..
A proton (q = 1.60×10?19C , m = 1.67×10?27kg)moves in a uniform magnetic fieldB? =( 0.490T )i^. What is the magnitude of the magnetic force acting on the proton
A point like charge of +20nC sits at the center of a thick spherical shell of inner radius 4cm and the outer radius 6cm. The shell is made of copper and has a net charge of -10nC. Describe the distribution of charge on the conductor
q1. in a car lift the output plunger has a radius of 9cm. the weight of the plunger and the car is 21600n. what is the
A mass of 180g is held by a horizontal spring of constant 22 N/m. It is displaced from its equilibrium position and released from rest. What is the magnitude of initial displacement
A 50cm long non-conducting cylinder of radius 4cm has a volume charge density of 30 uC/m^3. A grounded conducting cylindrical shell of radius 6cm is placed concentrically around the charged cylinder.
We know that a spherical charged particle of will have an external electric field of E = k q/r2, where k = 8.988×109N·m2·C-2 is the Coulomb constant, q is the charge, and r is the distance from the center of the spherical particle.
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