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in proton-beam therapy a high-energy beam of protonsis fired at a tumor the protons come to rest in the tumordepositing
a 60kg person walks on a 100kg log at therate of 080ms with respect to he log with what speed does the log move with
a 260 g block is dropped onto arelaxed vertical spring that has a spring constant of k 25 ncm the block becomes
katie a 300-kg child climbs a tree a to rescue her cat who isafraid to jump 80m to the ground how much work does katie
a bat can detect small objects such as an insect whose sizeis approximately equal to one wavelength of the sound the
a round wooden log with a diameter of 85 cm floats with 18of its radius out of the water what is the logs
a beam of electrons is accelerated through a potential difference of 10kv before entering a velocity selector if the
a 1-kg steel ball and a 2-m cord of negligible mass make up asimple pendulum that can pivot without friction about a
a 180 nsphere 020 m in radius rolls without slipping 60 m down a rampthat is inclined at 34deg with thehorizontal what
a child operating a radio-controlled model car on a dock accidentally steers it off the edge the cars displacement 082
the electric field in a cathode ray tube is supposed to accelerateelectrons from 0 to 320107 ms in a distanceof 300 cm
a determine the magnetic moment due to a wireloop 13cm x 15cm that carries a current of 200 ma and is situatedin a
a skateboarder shoots off a ramp with a velocity of 58 msdirected at an angle of 54deg above the horizontal the end
a 500-g ball moves at 300 ms if its speed is measured to anaccuracy of 010 what is the minimum uncertainty in its
a pair of speakers separated by 0700m are driven by the same oscillator at a frequency of 658 hz an observer originally
the spacing between certain planes in a crystal is known to be 030nm find the smallest angle of incidence at which
a 10 n force is applied to a wheel with a radius of 3 cmcausing an acceleration of 12 rads2 what is the rotational of
a 33 kg block initially in motion is pushed along ahorizontal floor by a force f of magnitude 17 n at an angle
a student who weighs 500 n climbed the stairs from the firstfloor to the third floor 15 m above in 20 seca how much
a cart with a mass 340g moving on frictionless linear airtrack at an intial speed od 102ms undergoes an
two buckets of sand hang from opposite ends of a rope thatpasses over an ideal pulley one bucket is full and weighs 120
a 520 g bullet moving at 672 ms strikes a 700g wooden blockat rest on a frictionless surface the bullet emerges
a lumberjack mass 98 kg is standing at rest on one end of afloating log mass 290 kgthat is also at rest the
a scuba diver releases a 350 cmdiameter spherical bubble of air from a depth of 100 m in alake assume the temperature
a brass lidscrews tightly onto a glass jar at 20degc to help open the jarit can be placed into a bath of hot water