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a man stands on the roof of a 190 -tall building and throws a rock with a velocity of magnitude 300 at an angle of 420
electrons from a heated filament pass through a hole in the cathode they are then accelerated between the cathode and
a singly charged positive ion has a mass of 177 times 1026 kg after being accelerated through a potential dierence of
a wire carries a steady current of 154 a a straight section of the wire is 0616 m long and lies along the x axis within
a gem-quality diamond has a small flaw located 1 mm directly below one face how far below the face does this flaw
a thin pole extends straight up from the bottom of a clear pond 2 m deep the pole extends 12 m above the surface of the
a mass m1 53 kg rests on a frictionless table and connected by a massless string to another mass m2 53 kg a force of
you make a plot of displacement y y0 in meters versus spring force fs in newtons for the data you have collected in
a styrofoam ball of mass 0120 g is placed in an electric field of 6000 nc pointing downward what charge must be placed
two point charges of 200 c and -800 c are separated by a distance of 200 cm what is the intensity of electric field e
a 10-c charge is 15 m from a second charge and the force between them is 10 n what is the magnitude of the second
an atomic nucleus has a charge of 40e an electron is 10-9 m from the nucleus what is the force on the
chinook salmon are able to move through water especially fast by jumping out of the water periodically this behavior is
suppose a conducting sphere of radius 40 cm has a charge of 7 mc and a mass of 2 kg what is the electric potential at
a bare helium nucleus has two positive charges and a mass of 664 multiplied by 10-27 kga calculate its kinetic energy
a large capacitance of 120 mf is needed for a certain applicationa calculate the area the parallel plates of such a
a 56 box is on a frictionless 44 slope and is connected via a massless string over a massless frictionless pulley to a
an incandescent light bulb is rated at 100 w when the applied voltage is 120 va what is the resistance of the bulb when
a painter is standing on scaffolding that is raised at constant speed as he travels upward he accidentally nudges a
an automobile and a truck start from rest at the same instant with the automobile initially at some distance behind the
a 3500 kg parked car with brakes off and free to move is bumped from the rear by a 2000 kg car moving 40 ms and they
salmon swimming up the fraser river to their spawning grounds leap over all sorts of obstacles the unofficial
a projectile is fired at 500 o above the horizontal its initial speed is equal to 1075 ms assume that the free-fall
when a potential difference of 12 v is applied to a wire 68 m long and 026 mm in diameter the result is an electric