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a student drops two metallic objects into a 120 g steel container holding 150 g of water at 25degc one object is a220 g
a sound wave with an intensity level of 810 db is incident on an eardrum of area0600 10-4 m2 how much energy is
when 215 g of a substance is heated to 330degrees celcius andthen plunged into a 100-g aluminum calorimeter cup
one of james bonds adversaries is standing on a frozen lakethere is no friction between his feet and the ice he throws
three moles of a monatomic ideal gas are heated at a constantvolume of 240 m3 theamount of heat added is 472 103 ja
the distance to a point source is increased by a factor of3a by what factor does the intensity decreaseb by what amount
one hundred turns of insulated copper wire are wrapped arounda wooden cylindrical core of cross-sectional area 805
the density of helium gas at t0 degrees celcius is 0179kgm3 temp is raised to 100 degrees celcius but pressure
an electron drops from the l shell to the k shell and givesoff an x-ray with a wavelength of 00200 nm what is the
a 67-kg skier is going down a 31 deg slope the area of eachski in contact with the snow is 019 m2 determine the
a bicyclist traveling with speed v 42 ms on a flat road ismaking a turn with a radius r 64m the forces acting on
one gram of water changes from liquid to solid at a constantpressure of 100 atm and a constant temperature of 0degc in
air like all fluids exerts a buoyant force on objects thusan objects apparent weight in air is slightly less than its
a cat stands facing a converging lens with its tail in theair under what circumstances if any would the image of
a 3690-linecm grating produces a third-order fringe at 214deg angle what wavelength of light is being
if you observe light reflected from saturns rings youshould see a redshift at one edge of the rings and a blueshift
an car mass 1000kg is traveling east30ms it is hit by another car 2000kg whick was travelingnorthwest at 20msthe two
a steel cable is to support an elevator whose total loadedmass is not to exceed 3100kg if the maximum acceleration of
a power of 1 horesepower is equivalent to 746 w what is the power output in horsepower of an electric motor that draws
a rotating bicycle wheel has an angular speed of 3 rads at t 0 it is also given an angular acceleration of 15rads2a
an car mass 1000kg is traveling east 30ms it is hitby another car 2000kg whick was traveling northwest at20msthe two
a juniper-wood plank measuring 025 ft by 1ft by 16 ft istotally submerged in watera what is its weightb what is the
a storage tank 30 m high is filled with gasolinea find the gauge pressure at the bottom of the tankb calculate the
a light rigid rod 100 in lngth rotates about an axisperpendicular to its length and through its center twoparticles of
two musics students are tuning their guitars before arehearsal if one middle c 262hz and the other plays a c sharp277hz