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a box slides across a frictionless floor with an initial speed v 49 ms it encounters a rough region where the
the tension in a copper wire of length 05 m with two ends fixed is 200 na what is the tensile stress if the cross
a 280 uf capacitor is charged to 160 uc and then connected across the ends of a 460 mh inductora find the maximum
a car moving at 35 ms approaches a stationary whistle that emits a 220hz sound the speed of sound is 343ms what is the
a solid cyclinder of mass 20 kg and radius 02 m is rotating uniformly at an angular velocity 20 rads around the fixed
two blocks of the same mass 05 kg head-on collide on a frictionless horizontal surface the velocities before the
the windpipe of a typical whooping crane is about 45 ft long what is the lowest resonant frequency of this pipe
a weight lifter does a series of arm raises while holding a 300 weight her forearm including the hand starts out
a glass window with an area of 13m2 is 4mm thick what is the rate of heat of flow through the glass if one surface is
a ball is tied to the end of a cable of negligible mass the ball is spun in a circle with a radius 200 m making 700
a 1010 kg car and 4600 kg truck undergo a perfectly inelastic collision before the collision the car was traveling
jason has a 45-power telescope whose objective lens has a focal length of 120 rm cm to make his sister appear smaller
a proton mass 16710 -27 kg is moving at 14010 -6 ms directly toward a stationary helium nucleus mass 66410 -27 kg1-
at a distance of 600 km from a radio station antenna the electric-field amplitude is 760times102 vmassuming that the
a student sits on a freely rotating stool holding two dumbbells each of mass 302 kg see figure below when his arms are
a playground merry-go-round of radius r 180 m has a moment of inertia i 260 kg middot m2 and is rotating at 110
a counterweight of mass m 420 kg is attached to a light cord that is wound around a pulley as shown in the figure
one method for measuring the speed of sound uses standing waves a cylindrical tube is open at both ends and one end
a 180-kg particle moves in the xy plane with a velocity of v 460i 320j ms determine the angular momentum of the
a 10000 kg empty railroad car moving at 3 ms collides with a loaded railroad car weighing 196000 n and couples with it
a 140 g ball moving at 035 ms in the x-direction is subject to a 020 n force in the - y-direction for 20 s1- find the
the air speed indicator of a plane that took off from detroit reads 343 kmh and the compass indicates that it is
your friends car is parked on a cliff overlooking the ocean on an incline that makes an angle of 199 below the
what is the work done by the electric field on a charge q as it moves through a potential difference of v use any
a certain traffic light is yellow for 270 s before it turns red as you approach the intersection you must decide