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A truck can move up a road having a grade of 1.0-ft rise every 50-ft with a speed of 15 mi/h. The resisting force is equal to one twenty-fifth the weight of the truck. If its power output is the same, how fast will the same truck move down the hill? Assume that the resisting force remains unchanged.
A loudspeaker of mass 23-{rm kg} is suspended a distance of h = 1.80- {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.10- {rm m}. What is the tension T in each of cables.
a 106 kg object moves in a horizontal straight line with an initial speed of 58 ms. if it is stopped along that line
question an achromatic lens is made of two very thin lenses with focal lengths f1 -28.7 cm and f2 20.4 cm that are
A 8cm radius disk with a rotational inertia of .12kgm^2 is free to rotate on a horizontal axis. A string is fastened to the surface of the disk and a 10kg mass hangs from the other end. The
A simple pendulum has a mass of 0.550 kg and a length of 4.00 m. It is displaced through an angleof 55.0° and then released. What is the maximum angular acceleration
a copper puece of mass 140g and of temperature 240 degree is placed into 360g of water at temperature 25 degree. Find the final equilibruim temperature
A thin uniform rod m= 0.50kg ( swings about an axis that passesthrough one end of the rod and is perpendicular to the plane of the swing, What is the length of the rod
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
A particular myelinated axon has nodes spaced 0.80 mm apart. find the conduction speed of a nerve impulse along this axon
a solid uniform spherical marble with mass 1kg and r .02m rolls down a hill starting from rest. the hill is 1m high and
on a banked race track the smallest circular path on which cars can move has a radius of 106 m while the largest has a
a flat circle of radius 20 is placed in a uniform electric field of magnitude 6.5times102. what is the electric flux
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