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it is desired to cool iron parts from 500degf to 100degf by dropping them into water that is initially at 55degf
an aluminum cup contains 225 g of water and a 40 g copper stirrer all at 27degc a 470 g sample of silver at an initial
an external force moves a 54-kg box at a constant speed up a frictionless ramp the force acts in a direction parallel
an aluminum rod is 230 cm long at 20degc and has a mass of 350 g if 15000 j of energy is added to the rod by heat what
a block of ice of mass 370kg is placed against a horizontal spring that has force constant k 230nm and is compressed a
compute the kinetic energy in joules of an automobile of mass 1700kg traveling at a speed of 550kmhby what factor does
at the instant the traffic light turns green an automobile starts with a constant acceleration a of 21 ms2 at the same
a galvanometer has a coil with a resistance of 75 a current of 156 ma causes full scale deflectiona calculate the
a uniform bar of length 18 m and mass 1 kg is attached to a wall with a hinge that exerts a horizontal force hx and a
runner a is initially 46 km west of a flagpole and is running with a constant velocity of 48 kmh due east runner b is
a 300-cm-diameter parallel-plate capacitor with a spacing of 0200mm is charged to 300v what is the total energy stored
a car is traveling at 500 mih on a horizontal highwaya if the coefficient of static friction between road and tires on
an elevator is moving upward at 107 ms when it experiences an acceleration 030 ms2 downward over a distance of 071 m
two astronauts initially at rest in space push on each other after the push the first one of mass m1 moves backward at
in preparation for an experiment that you will do in your introductory nuclear physics lab you are shown the inside of
a tennis ball with a velocity of 76 ms to the right is thrown perpendicularly at a wall after striking the wall the
the membrane of the axon of a nerve cell is a thin cylindrical shell of radius r 10-5 m length l 014 m and thickness
it takes a runner 3 h 9 min 4 s to run a marathon if the distance of a marathon is 422 km what is the average speed of
a car traveling in a straight line has a velocity of 41 ms after an acceleration of 062 ms2 the cars velocity is 88 ms
a 6100 kg rocket is set for vertical firing from the earths surface the exhaust speed is 1400 msa how much gas must be
a football is kicked at ground level with a speed of 150 ms at an angle of 340deg to the horizontal how much later does
a proton with a speed of 30 x 105 ms falls through a potential difference v and thereby increases its speed to 90 x 105
a woman supports a 50 kg barbell at 90 degrees by contracting the biceps in both arms her biceps insert 4 cm from the
an ac generator is to have a maximum output of 340 v each coil has an area of 0127 m2 and a resistance of 170 and
reduce the expression for the time rate of change of the expectation value of the y component of orbital angular