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a spring with k128 nm is compressed to a distance 20 pastequillibrium and is used to project a ball with mass 4
when a 689-g sample of cacl2 dissolves in 250 g water in a coffee cup calorimeter the temperature rises from 220 to 269
a certain pesticide is fatal to fish fingerlings at a level of 050 parts per million in water a leaking metal can
a student holds a tuning fork oscillating at 256 hz he walkstoward a wall at a constant speed of 133 msa what beat
the work to required to strech a certain spring by an elongation of 400 cm to an elongation of 500cm is 305 j ais the
a cable is lifting a construction worker and a crate the weights of the worker and crate are 965 and 1510 n
a 643-g piece of aluminum at 94 degc was immersed into 700-g water at 250 degc the water temperature rose to 364 degc
a vertical spring stores 0962 j in spring potential energy whena 35-kg mass is suspended from itaby what
a helicopter drops an inflatable raft to flood victims floating ina lake when the raft is released the helicopter is 50
how many g of product are actually used when a chemist calculates the theoretical yeild of a product at 201 g and the
a 1200 rm kg car moving at 88 rm kmh collides with a 7600rm kg truck moving in the samedirection at 65 rm kmh the two
aniline is an organic base used in the manufacture of dyes calculate the in a 012 solution of aniline
assume that a loudspeaker broadcasts sound equally in alldirections and produces sound with a level of 109 db at a
when heated potassium chlorate decomposes to yield oxygen and potassium chloride calculate how much heat is needed to
a 50-gram ice cube at -30 degrees celcius is heated until 45g hasbecome water at 100 degree celcius and 5g has become
a cylindrical cistern constructed below ground levelis 28 m in diameter and 20m deep and is filled to the brim with a
ball a moving to the east collide with ball b and c which are atrest after collision ball b went northe with speed of 3
what is the temerature in c of gas if the volume is changed to 579 l and the pressure is changed to 765 mmhg if the gas
youve got light traveling in air that hits the top of awater-filled swimming pool perpendicularly ie the angle of
butanec4h10 is used as a fuel where natural gas is not avaiable how many grams of butane will fill a 450 liter
a 004 kg ball is thrown from the top of a 30 m tall building at anunknown angle above the horizontal the ball attains a
calculate the ph the percent dissociation as well as the consecration of c6h5o- and oh- in a 010 m phenol solution
a 10-kg block is set moving with an initial speed of 6 ms on arough horizontal surface if the coefficient of
will a acid catalyzed sn2 reaction between 1-butanol and sodium acetylide proceed as depicted please
a mass is suspended from the ceiling of a train car by a 454cm long piece of string a passenger notices that the mass