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a passenger in a train that moves horizontally looksoutside and sees a child hitting a ball straight up to a height
in the first step of the chain reaction of a nuclear explosion a 235 u nucleus absorbs a neutron the resulting 234 u
the staples inside a stapler are kept in place by a springwith a relaxed length of 0115 m if the spring constant is
gallium-67 is used in nuclear medicine after treatment a patientamp39s blood gave a radioactivity of 20000 counts per
if 500 of the unknown compound contained 0167 of and 0333 of how many moles of oxygen were in the
a 1500 kg car traveling at 90 kmh east collides with a 3000 kg cartraveling at 60 kmh south the two cars stick together
the filament of a light bulb has a temperature of 28103degc and radiates 55 watts of power the emissivityof the
if 75ml of a 075 m hcl are mixed with 300 ml of a 15 m hcl solution what is the molarity of the resulting
suppose the surfae a circular space station is rotating at358ms what must be the value of the radius for the astronauts
a satellite circles the earth in an orbit whose radius is twice theearths radius the earths mass is 598 x 10 24 kg and
glycerol c3h8o3 is used as a moistening agent for candy and is the starting material for nitroglycerin calculate the
an aqueous solution of calcium hydroxide is standardized by titration with a 0384 m solution of hydroiodic acid if 142
if 452 ml of 0116 m hcl solution is needed to neutralize a solution of koh how many grams of koh must be present in the
a 25-kg object is being lifted by pulling on the ends ofa 100-mm-diameter string that goes over two 300-m-high
the combustion of glucose is as followsc6h12o6 s 6o2 6co2 g 6h2o lassuming that none of the intermediates have
electrons in an x-ray machine are accelerated from restthrough a potential difference of 50 000v what is the kinetic
assume that the earth has an average surface temperature of29degc and is a perfect emitter of radiation e 1 find the
1 explain what you would do to prove that a solution contained leadii ion2 you are given a white solid and told that it
io a small moon of the giant jupiter has an original period of177 days and an orbit radius equal to 422 x 105 km from
hydraulic stamping machines exert tremendous forces on a sheetof metal to form it into the desired shape suppose the
given that the moon period about the earth is 2732 days andthe distance from the earth to the moon is 384 x 108 m
if 3278 ml of naoh solution is required to neutralize 2000 ml 0f 02500 m of oxalic acid h2c2o4aq what is the
a pail of water is rotated in a vertical circle of radius 100 m the approximate length of a person arm what must be the
an enzyme with a km 2 x 10e-4 m for its substrate and a vmax o 55 x 10e-5 moles per liter-min was assayed for its
an airplane is flying un a horizontal circle at a speed of 100 msthe 800 kg piolot does not want her radial accerlation