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two small plastic spheres are given positive electrical charges when they are 180cm apart the repulsive force between
a small 300 g cart is moving at 130 ms on an air track when it collides with a larger 400 kg cart at rest after the
a 200times104 kg railroad car is rolling at 300 ms when a 7000 kg load of gravel is suddenly dropped in what is the
a hall-effect probe operates with a 120 -ma current when the probe is placed in a uniform magnetic field of magnitude
a current of 270 ma is maintained in a single circular loop of 190 m circumference a magnetic field of 0870 t is
a horizontal power line of length 582 m carries a current of 218 ka northward the earths magnetic field at this
a rod of mass m and radius r rests on two parallel rails that are a distance d apart have a length l the rod carries a
in niels bohrs 1913 model of the atom the electron is in a circular orbit around a nucleus an electron is 550 10-11 m
a wire carries a steady current of 260 a a straight section of the wire is 0750 m long and lies along the y axis within
a series rc circuit is driven by an alternating voltage source at a frequency of 103 hza if r 329 and c 100 microf by
a magnetized sewing needle has a magnetic moment of 1104 ma middot m2 at its location the earths magnetic field is 559
while preparing tea water in a mine shaft deep underground you notice that water boils at 105 c assuming that the mine
in an oscillating lc circuit in which c 415 microf the maximum potential difference across the capacitor during the
an accelerating voltage of 259 103 v is applied to an electron gun producing a beam of electrons originally traveling
a cyclotron designed to accelerate protons has an outer radius of 0357 m the protons are emitted nearly at rest from a
singly charged uranium-238 ions are accelerated through a potential difference of 226 kv and enter a uniform magnetic
consider the mass spectrometer shown schematically in the figure below the magnitude of the electric field between the
a cosmic-ray proton in interstellar space has an energy of 170 mev and executes a circular orbit having a radius equal
an electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 214 mt if the speed
an ac generator emf is m sin d t with m 264 v and d 301 rads it is connected to a 154 h inductora what is the
an electron is accelerated through 285 103 v from rest and then enters a uniform 240-t magnetic fielda what is the
a proton moving at 350 106 ms through a magnetic field of magnitude 166 t experiences a magnetic force of magnitude 840
if we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light
if we observe a stars spectrum and find that the peak power occurs at the border between red and infrared light what is
in a large centrifuge used for training pilots and astronauts a small chamber is fixed at the end of a rigid arm that