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a 500-n person stands on a uniform board of weight 100 n and length80 m the board is supported at each end if the
ch3nc isomerizes when heated to give acetonitrile ch3cn the reaction is first order at 230c the rate constant for the
write the isotope notation for the element that has 77 neutrons 54 electrons and has a net charge of
so2cl2 decomposes when heated the initial concentration of so2cl2 was 00248 moll if the rate constant is 22x10-2s what
a 10-m uniform beam of weight 100 n is supported by two ropes atthe ends if a 400-n person sits at 20 m from the left
a lever is 50 m long the distance from the fulcrum to the weightto be lifted is 10 m if a 3000 n rock is to be lifted
a lever is 50 m long the distance from the fulcrum to the weightto be lifted is 10 m if a worker pushes on the opposite
silica gel is a common chromotography stationary phase what is silica gel why is it a preferred media for the
two equal-sized buckets are filled to the brim with water but oneof them has a piece of wood floating in itwhich bucket
a 40-year-old manager at a prominent legal firm in la experiences abdominal pain post lunch he goes to the restroom a
an apple crate with a weight of 375 n accelerates along a frictionless surface as the crate is pulled with a force of
when the net force that acts on a hocey puck is 14 n the puckaccelerates at a rate of 480 ms2 determine the mass of the
a solution is prepared by mixing 3500 ml of 0061 m znno32aq with 2000 ml of kohaq with 2000 ml kohaq with a ph of 900a
2 solution are mixed 100 ml of 00020 m hbraq with 10000 ml of 00015 m caoh2aq what is the ph of the resulting
a 169 g cube of ice at0c is dropped into 29 kg of water that wasoriginally at 79cwhat is the final temperature of the
which if any of the fractions obtained from each of the two distillations conducted in this experiment had boiling
two forces act on a14 kg object the first force has a magnitude of 70 n and is directed 28 north of east the second
how many grams of each of the following substances will dissolve in 100ml of cold water consult a handbook ceio34 raso4
a spring-loaded pellet gun is designed to fire 240 g projectiles horizontally at a speed of474 msa if the spring is
what is the percent yield of a reaction in which 1455 g phosphorus trichloride reacts with excess water to form 694 g
tooth enamel is mainly hydroxyapatite if 1150g of tooth enamel reacts with hydrochloric acid to give 1231g of calcium
in 1898 pierre amp marie curie isolated about 10mg of radium-226 from eight tons of uranium ore if this sample had been
a neon sign is made of glass tubing whose inside diameter is 40 cm and whose length is 53 m if the sign contains neon
a transverse wave of wavelenght 050m travels along a rope if the frequency of the wave is 400hz what is the speed of
the speed of the fastest pitched baseball was 45 ms and the balls mass was 145g what was the magnitude of the momentum