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a nuclear power plant has an electrical power output of 900 mw and operates with an efficiency of 32 if excess energy
determine the ph of a solution that is 180 naoh by mass assume that the solution has density of 101
a 42-kg girl is standing on a 125-kg plank the plank originally at rest is free to slide on a frozen lake which is a
it is important for the body to have mechanisms to effectively cool itself if not moderate exercise could easily
the mass spectrum of n-octane shows a prominent molecular ion peak mz 114 there is also a large peak of mz of 57 but it
an avalanche of ice and snow of mass 1 800 kg slides a vertical distance of 160 m down a mountainside if the
what is the definition and units for atomic mass what is the difference between molecular mass and nominal mass which
a sample of pure no2 is heated to 338 degrees c at which temperature it partially dissociates according to the
a person typically contains 50 l of blood of density 105 gml when at rest it normally takes 10 mint to pump all this
to a small degree some of the fuel supplied in the united states contains 5 ethanol c2h5oh if the density of this fuel
a venturi tube may be used as the inlet to an automobile carburetor if the 20-cm diameter pipe narrows to a 10-cm
an electron is excited from the n1 ground state to the n3 ground state in a hydrogen atom which of the following
select the statement below that describes the magnetic environment of hydrogens bonded to the sp2 hybrid carbons of pi
consider a reversible heat engine operating between two reservoirs r1 and r2 initially at temperatures th and tc
a 430 kg block of wood hangs from the ceiling by a string and a 710 x 10-2 kg wad of putty is thrown straight upward
sometimes mirages are formed when light reflects from of a warm layer of air near a hot surface like a road if it is
consider the titration of a 250 -ml sample of 0105 m hc2h3o2 with 0125 m naoh determine the ph at 600ml of added base
a square loop of wire with 200m sides is perpendicular to a uniform magnetic field that points into the paper the
a gaseous mixture of no2 and n2o4 is in equilibrium if the concentration of n24 is 53 x 10-5 m what is the
q the reduction potential of agaq to ags is 080 v and the reduction potential of cu2 aq to cu s is 034 v a galvanic
an uncharged capacitor and a resistor are connected in series to a source of emf if 1200 v c 170 microf and r 100
the following solutions were mixed together 500ml of a 0761m feso4 and 200ml of a 105m k2cr2o7 in dilute sulfuric acid
write the balanced chemical reaction for the reaction between hydrochloric acid hcl and calcium hydroxide caoh2 when
a frictionless spring of spring constant 500 nm has one end attached to a vertical wall and the other end to a block of
2nh3g----n2g 3h2 g at equilibrium it was found that the concentrations were 0584m for h2 0195m for n2 and 430m for nh3