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a positron accelerated from rest by a fixed potential difference acquires a speed of 03c what speed is achieved by a
a mass m1 170 kg and a mass m2 105 kg are suspended by a pulley that has a radius of 98 cm and a mass of 31 kg see
three long straight electrical cables running north and south are tightly enclosed in an insulating sheath one of the
in the bohr theory of the hydrogen atom an electron moves in a circular orbit about a proton with a radius of 53 x 106
a uniform ladder of mass m and length l leans against a frictionless wall if the coefficient of static friction between
under what conditions would the frictional forces be expected to be equal in magnitude for a car moving up an incline
the electron in the b-field an electron moves in a 05nt b-field if the radius of the circular orbit is 1cm what is its
if a force of 10 n is needed to open an 100 cm wide door when applied at the edge opposite the hinges what force must
at a winter fair a 655-kg stunt man is shot from a horizontal cannon that rests at the edge of a frozen lake the human
a concave mirror has a focal length of 442 cm the distance between an object and its image is 681 cm find a the object
light falls on a pair of slits 000198 cm apart the slits are 842 cm from the screen the first-order bright line is 188
a cat is stuck in a tree you are designated with the job to get it out yet you do not want to climb the tree because
a wheel starts from rest and rotates about its axis with constant angular acceleration after 74 seconds have elapsed it
a solid disk rotates in the horizontal plane at an angular velocity of 0049 rads with respect to an axis perpendicular
a tightrope walker is practicing she is balanced on a rope at the exact midpoint of the rope the tension in the rope is
a block of mass m1 29 kg initially moving to the right with a speed of 41 ms on a frictionless horizontal track
a 120 kg scaffold is 66 meters long it is hanging with two wires one from each end a 540 kg box sits 1 meter from the
a uniform thin rod of length l25 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its
the current density inside a long solid cylindrical wire of radius a is in the direction of the central axis and its
a ray in a glass is incident onto a water-glass interface at an angle of incidence equal to half the critical angle for
the side-view mirror of an automobile has a radius of curvature of 150 cm the mirror produces a virtual image one-third
a proton is shot at 4 times 107 ms toward a gold atom with a mass 197 times that of the proton and deflects it straight
compare the motion of two objects before a collision with their motion after the collision you should be able to find a
a small 2 g bullet moving at v0 2000 ms inbeds itself in a 1kg block at the top of an inclined plane with an angle of
suppose that the central diffraction envelope of a double-slit diffraction pattern contains 11 bright fringes and the