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a 250 kg gold bar at 28oc is placed in a largeinsulated 0800 kg glass container at 150oc with200 kg of water at 250oc
three blocks abc each having mass m are connected by strings as shown block c is pulled to the right by a force f that
a car of mass 1500 kg rounds a circular turn of radius 20m if theroad is flat and the coefficient of static friction
three resistors 25 45 and 75 ohms are connected in series and a 051-a current passes through them what is a the
a sample of helium behaves as an ideal gas as it is heated atconstant pressure from 273 k to 343 k if230 j of work is
when an incandescent light bulb is turned on the tungsten filament becomes white hot the temperature coefficient of
a 011-kg balloon is filled with heliumdensity 0179 kgm3 if the balloon is a sphere witha radius of 50 m what is the
a tugboat pulls a ship with a constant net horizontal force of 2720 newtons and causes the ship to move through a
two light bulbs are designed for use at 120 v and are rated at 75 w and 150 w which light bulb has the greater
a catcher gives with a baseball when catching it if the baseball exerts a force of 463 newtons on the glove such that
an electron of kinetic energy 144 kev circles in a planeperpendicular to a uniform magnetic field the orbit radius is
an antitank weapon fires a 30 kg rocket which acquires a speed of 50 ms after traveling 90 cm down a launching tubenbsp
a shopper in a supermarket pushes a cart with a force of 36 newtons directed at an angle of 26 degrees downward from
a flatbed truck carries a load of steel only friction keeps the steel from sliding on the bed of the truck the driver
wxe consider the harmonic oscillator in one-dimensionh -h2md2dx2 12momega2x21 write down the lowest energy ground
two pianos each sound the same note simultaneously but they areboth out of tune on a day when the speed of sound is 343
you push a 325-n trunk up a 200 degree inclined plane at aconstant velocity by exerting a 211-n force parallel to the
you pull your 18-kg suitcase at constant speed on a horizontalfloor by exerting a 43-n force on the handle which makes
1nbspnbspnbsp suppose that next year the us will be in one of the following economic conditions boom moderate growth
suppose the pear is released from a height of 6 m above robins arrow the arrow is shot at a speed of 30 ms and the
a walkway suspended across a hotel lobby is supported at numerouspoints along its edges by a vertical cable above each
neutron stars such as the ones at the center of the crab nebulahave about the same mass as our sun but have a
a steel wire of length 17 m anddiameter 110 mm is joined to analuminum wire of identical dimensions to make a composite
the plate separation of a charged capacitor is 006104 m aproton and an electron are released from rest at the
an empty parallel plate capacitor is connected between theterminals of a 156-v battery and charges up the capacitor is