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a 200m wide river flows due east at a uniform speed of 20msa boat with a speed of 80ms relative to the water leaves
a ball is dropped from rest at the top of a 610 m tallbuilding falls straight downward and collides inelastically
complete the reaction write the equation as a balanced equation complete ionic equation and net ionic equation be sure
a skier is gliding along at 472 ms on horizontal frictionless snow he suddenly starts down a 192deg incline his speed
-- 243 g of magnesium yield 403 g mgo upon combustion with oxygen how much magnesium needs to be burned to yield 121 g
a 663 kg elevator starts from rest it moves upward 27s with aconstant acceleration until it reaches its cruising speed
a rock is tossed straight up with a velocity of 400 mswhen it returns it falls into a hole 115 m deep what is therocks
a rock is dropped from a sea cliff and the sound of it strikingthe ocean is heard 32 s later if the speed of sound
the solubility of benzoic water in acid at 0 degrees c is 90gm100ml in a recrystallization of benzoic acid 225gm
a fire helicopter carries a 580 kg bucket of water at the end of a 200 m longcable flying back from a fire at a
a 320 kg steel ball strikes a wall with a speed of100ms at an angle of 600 degrees with the surface it bouncesoff with
calculate the volume of a 0122 m potassium permanganate solution needed to react with a second 150 ml sample of the
a 750 kg stunt man jumps from a balcony and falls 240 mbefore colliding with a pile of mattresses if the mattresses
a first order reaction has an activation energy of 592 kjmol and a frequency factor arrhenius constant of 913 x 1013
a diver performing a double somersault spins at an angular speed of49pi rads precisely 070 s after leaving the
a helicopter lifts a 81 kgastronaut 20 m vertically from theocean by means of a cable the acceleration of the astronaut
a student weights out 1000 g of iron ii ammonium sulfate hexahydrate mw 39214 gmol what is the minimum amount in ml of
a simple pendulum 20 m in length is released with a pushwhen the support string is at an angle of 25 from the vertical
consider the reaction cog 3h2g ch4g h2og with kc41 x 105 at 773 k the following amounts of substances are added to a
a figure skater begins spinning counterclockwise at an angularspeed of 47 pi rads during a 49 s interval she slowly
in 2008 carbon dioxide levels at the south pole reached 385 parts per million by volume the 1985 reading was 3146 ppm
a solution of 085 g of an organic compound in 1000 g of benzene has a freezing point of 516c what is the molality of
a beetle sits at the top of a bicycle wheel and flies away just before it would be squashed assuming that the wheel
10 g of compound a is dissolved in 250 ml of water a single extraction with 200 ml of ether was performed after which
the driver of a car slams on her brakes to avoid collidingwith a deer crossing the highway what happens to the cars