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a sample of tl-201 has an initial decay rate of 588 x 10 to the 4 seconds how long will it take for the decay rate to
a child is in danger of drowning in the merimac river the merimac river has a current of 31 kmhr to the east the child
one of the nuclides in spent nuclear fuel is u-235 an alpha emitter with a half-life of 703 million years how long
you are traveling on an airplane the velocity of the plane with respect to the air is 1600 ms due east the velocity of
calculate g at 298 k for the reaction of nitrogen and hydrogen to form ammonia if the reaction mixture consists of 050
indicate whether each of the following processes produces an increase or decrease in the entropy of the systema co2s
1 draw a newman structure for meso-3-4-dibromolhexane2 show how to prepare 3-pentanol from ethyne3 show how to prepare
consider the reaction of nano2 in water using the kb of no-2 calculate gdeg for the hydrolysis at
you are on a cruise ship traveling north at a speed of 130 ms with respect to land1 if you walk north toward the front
draw the fischer projection formula for 2r4r-pentanediol state how many stereoisomer of this compound also draw any two
the particles in the nucleus of an atom are approximately 100times1015 apart while the electrons in an atom are about
a person can change the volume of his body by taking air into his lungs the amount of change can be determined by
calculate the number of moles of gaseous nitrogen contained in a sample of 227 ml of gas saturated with water vapour at
in the process of changing a flat tire a motorist uses a hydraulic jack she begins by applying a force of 45 n to the
a 063 kg block attached to a spring with force constant 110 nm is free to move on a frictionless horizontal surface as
give the iupac names for each of the following compounds when a stereochemistry indicator is needed use the appropriate
if you dissolve equal amounts moles of nitric acid and nitrous acid in water the dissolved hno3 raises the boiling
a voltaic cell consists of an mnmn2 half-cell and a pbpb2 half-cell calculate pb2 when mn2 is 27 m and ecell 037
a vector has an x-component of 210units and a y-component of 500 units find the magnitude and direction of the
a stone is thrown upwards from the edge of a cliff 18m high it just misses the cliiff on the way down and hits the
calculate the standard emf of a cell that uses the mgmg2 and cucu2 half-cell reactions at
a ball is thrown vertically upward with a speed of 120 msa how high does it risemb how long does it take to reach its
part a a 055kg bullfrog is sitting at rest on a level log how large is the normal force of the log on the bullfrogpart
trimethylamine c3h9n is a weak base pkb 419 with a fishy odour in a titration of 2500 ml of aqueous trimethylamine
a bullet is fired through a board 50 cm thick in such a way that the bullets line of motion is perpendicular to the