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a stone is dropped from rest into awell the sound of the splash is heard exactly 250 s later find the depth of the well
in a science fiction story a microscopic black hole is given anenormous positive charge by firing an un-neutralized ion
the distance between two successive maximaof a transverse wave is 170 m eightcrests or maxima pass a given point along
three moles of nitrogen gas n2 at 270degc are contained in a 258 l cylinder find the pressure the gas exertson the
a skydiver jumps out of a plane and reaches her terminal speed of120 mph after falling for 15 s how fast will the
consider the titration of 300 ml of 0030 m nh3 with 0025 m hcl the equivalence point is reached when 36 ml of hcl
an unknown compound contains only carbon hydrogen and oxygen combustion of 400 of this compound produced 587 of carbon
a certain toaster has a heating element made of nichrome resistancewire when the toaster is first connected to a 110 v
given the following four substances bromine water carbon and air indicate whihc is expected to 1 be a homogeneous
a characteristic momentum for a particle in an ideal gas canbe found by the relationp22m32kt wherek is boltzmanns
a powerful laser can emit in 056x10-2 s anintense pulse of light having an energy of 4500 j if thefrequency of the
a toaster rated at 1055 w operates on a120 v household circuit and a 400 m length of nichrome wire as its heating
what volume of a 150 by mass naoh solution which has a density of 1116 gml should be used to make 540 l of an naoh
according to kinematicsx5gt2 the acceleration is dependant only upona the mass of the objectb the distance that the
a beam of ultraviolet radiation with frequency of278x1015 hz is directed on a clean metalsurface the work function of
a vessel of volume 224 dm3 contains 20 mol h2 and 10 mol n2 at 27315k initially all the h2 reacted with sufficient n2
the wavelength of visible light varies from 380 nm to 750nm as the color of the light changes from violet to red
a small ball rolls horizontally off the edge of a tabletop that is117 m high it strikes the floor at a point 118 m
110-phenanthroline forms a bright red complex with ironiii the complex has an analytical wavelength of 510 nm and has a
assume that the engine of a car with mass m supplies a constantpower p to the wheels to accelerate the car the car is
an airplane is flying with a velocity of 260 ms at an angle of 300deg with thehorizontal as the drawing shows when the
if 63 g barium chloride is reacted with excess sodium sulfate how many grams of barium sulfate are
a particle is uncharged and is thrown vertically upward from groundlevel with a speed of 500 ms as aresult it attains a
how many moles of ironiii hydroxide are needed to react with excess nitric acid to produce 670 g ironiii