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a standing observer perceives a train whistle to have a frequency of 300 hertz if the train is moving towards the
a spring hung vertically is 20 centimeter long when no mass hangs from it when a 2 kilogram mass is attached the spring
a 5 kilogram mass attached to a horizontal spring is pulled from its equilibrium position by 2 meter and let go if the
a one-turn circular loop carrying a current of 25 amp is located in a uniform magnetic field of 085 t and experiences a
a model of a red blood cell portrays the cell as a spherical capacitor a positively charged liquid sphere of surface
the electric motor of a model train accelerates the train from rest to 0740 meter per second in 30 milliseconds the
while running a man dissipates about 060 joule of mechanical energy per step per kilogram of body mass if a 69 kilogram
the voltage across the terminals of a 920 volt battery is 810 volt when the battery is connected to a 40 ohm load
a 400-kn piano is lifted by three workers at a constant speed to an apartment 276 meter above the street using a pulley
three resistors of 40 omega 60 omega and 120 omega are connected in parallel and this parallel group is connected in
a person of mass 71 kilogram stands at the center of a rotating merry-go-round platform of radius 27 meter and moment
a motor run by a 71 volt battery has a 16-turn square coil with sides of length 58 centimeter and total resistance 20
a 124 muf capacitor is connected through a 0895 mega ohm resistor and a 105 mega ohm resistor to a 60 volt batterya
two 10 centimeter diameter charged rings face each other 30 centimeter apart the left ring is charged to -30nc and the
a coils is connected in series with a 100 komega resistor an ideal 50 volt battery is applied across the two devices
the magnetic field of a cylindrical magnet that has a pole-face diameter of 33 centimeter can be varied sinusoidally
an lrc circuit has l 441 mh and r 212 komegaa find what value must c have to produce resonance at 352 khzb find what
earth has a mass of 598 x 1024 kilogram and a radius of 638 x 106 meter suppose it is a uniform solid sphere the
a certain digital camera having a lens with focal length 750 centimeter focuses on an object 175 meter tall that is 450
a merry-go-round with a moment of inertia equal to 1250 kgbullm2 and a radius of 25 meter rotates with negligible
a parallel-plate capacitor is to be constructed by using as a dielectric rubber with a dielectric constant of 320 and a
two long parallel wires carry currents of 0236 amp in the same direction if the wires are 0025 meter apart obtain the
a long straight wire carries a current of 200 ma obtain the magnitude of the magnetic field 0012 centimeter from the
a 013 meter segment of wire lies along the y-axis and carries a current of 38 amp in the negative y direction a uniform
if the electron drops back to the ground state will a photon be emitted if yes find what would be the energy or