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The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.20 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through the window during a 65-s phone call?
Tries 0/12 Calculate the magnitude of the electric field for the conducting sphere at a point 3.70 cm away from the center of the sphere.
Light of wavelength 520 nm passes through a slit of width 0.230 mm. How far is the screen from the slit
A 175-g object is attached to a spring that has a force constant of 72.5 N/m, Find the locations of the object when its velocity is one-third of the maximum speed
Laboratory in your city accidentally released some radioactive gas
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
A beam of light in air strikes a slab of glass ( n= 1.56) and is partially reflected and partially refracted, find the angle of incidence
A block-spring system oscillates with an amplitude of 3.65 cm. The spring constant is 250 N/m and the mass of the block is 0.200 kg. Determine the mechanical energy of the system
A wave has a wavelength of 456m and a frequency of 200Hz. What is the period of the wave? What is the wave speed?
A horizontal power line of length 58.2 m carries a current of 2.18 kA northward .The Earth's magnetic field at this location has a magnitude of 5.30 X10^-5 T. Find the magnitude of the magnetic force on the power line
What must the charge (sign and magnitude) of a particle of mass 1.40 be for it to remain stationary as placed in a downward-directed electric field of magnitude 670.
A ray of sunlight hits a frozen lake at a 43.9° angle of incidence. At what angle of refraction does the ray penetrate the ice
Light from a He-Ne laser of wavelength 633 nm passes through a circular aperture. It is observed on a screen 4.0 m behind the aperture. compute the diameter of the hole
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