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an initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not
a spider hangs from a strand of silk whose radius is36x10-6 m the density of the silk is 1500kgm3 when the spider moves
to decide the location of her center of mass a physics student lies on a lightweight plank supported by two scales250
de broglie postulated that the relationship lambda hp is valid for relativistic particles determine the de broglie
a father clock is controlled by a swinging brass pendulum that is 11 meter long at a temperature of 23degcdetermine the
an l-r-c series circuit has a resistance of 147 omega an inductance of 0780 h and a capacitance of 140times10-2 microf
a narrow but solid spool of thread has a radius r and mass m if you pull up on the thread therefore that the center of
the sound intensity level at a rock concert is 114 db while that at a jazz fest is 845 db find the ratio of the sound
a bat emits a sound whose frequency is 726 khz the speed of sound in air at 200 oc is 343 ms however the air
a photon has a wavelength lambda and an energy e before scattering from a free electron after scattering through a
a man stands between a vertical mirror 080 meter tall and a distant tree whose height is h he is 285 meter from the
as a marble with a diameter of 16 centimeter rolls down an incline its center moves with a linear acceleration of 33
a 320 kilogram wheel basically a thin hoop with radius 139 meter is rotating at 280 revmin it must be brought to a stop
a movie camera with a single lens of focal length 75 millimeter takes a picture of a 180 centimeter high man standing
a man is leaning against the vertical smooth wall his back is touching the wall and his feet are away from the wall
a 010 kilogram balloon is filled with helium density 0179 kgm3 if the balloon is a sphere with a radius of 63 meter
assume that when you ride on your 760-kilogram bicycle the weight of you and the bicycle is supported equally by the
a stationary horn emits a 113 hertz tone find what frequency is heard by a passenger on a train which is moving towards
a string 15 meter long with a mass of 25 gram is stretched between two fixed points with a tension of 99 newton obtain
when you press one of the buttons on a small calculator a 35 v battery provides a small constant current of 60mua for
a middle-aged people usually have poorer hearing than a middle-aged woman in one case a woman can just begin to hear a
the sound in a classroom is 61000 times as intense as the minimum threshold of hearing find what is the intensity level
a truck traveling east at 21 ms sounds a 1200 hz horn find the wavelength of the sound heard by a stationary listener
a man weighs 851 newton in air and has a body fat percentage of 208 percenta find the overall density of this man
in some kinds of optical spectroscopy such as photoluminescence and raman spectroscopy a laser beam exits from a pupil