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an 8 ohm speaker is connected across the output terminals of a power amplifier that delivers 72 w what is the current
if a polar analyte such as caffeine is run in both normal phase and reverse phase chromatography in which system will
a ring shaped space station with a radius of 1 km is spinning sothat the speed of the rim is 50 ms a 60 kg man sits on
estimate how many theoretical plates are needed to separate a liquid mixture of 70 mol hexane and 30 mol
a student sits on a rotating stool holding two 30 kg objects when his arms are extendedhorizontally the objects are 10
if performing a hplc on a complex mixture what things might i do to increase the resolution of the spectra be specific
one end of a spring of constant k 100 nm is attached to a wallto the other end is attached a mass m 21 kg the mass
if a person wished to reduce the retention time of a non-polar compound in reverse phase hplc what factors might i
two moles of sucrose are dissolved in eight moles of water assume that the solution follows raoults law but the vapor
a balloon is filled with helium gas at 200 degrees c and 10 atm pressure 1 atm 101 x 105 nm2 the volume of the balloon
arrange the following gases at the temperature indicated in order of increasing rms speed of the particles helium at
a 500 ml syringe has an inner diameter of 450 mma needle inner diameter of 0220 mm and a plunger paddiameter where you
if a solute interacts strongly with the stationary phase what practical implication might this
the hour minute and secondhands on a clock are 025 031 and 037 longrespectively what are the distances traveled by
in each of the following cases does the ratio pvnrt for a real gas have a value greater than or less than 1a attractive
to test the quality of the work of a commercial laboratoryduplicate analyses of a purified benzoic acid 688 c 4935
a spinning disc rotating at130 revmin slows and stops 31 s later how many revolutions did the disc make during this
a boat whose speed in still water is 170 ms must cross a 260m wide river and arrive at a point 110m upstream form where
how would a decrease in the volume of a gas initially heldat stp affect the kinetic energy of the gas if t is constant
a motorboat whose speed in still water is 260 ms must aim upstream at an angle of 285 degrees in order to travel
a flywheel in the form of a heavy circular disk of diameter 0600 meters and mass 200 kg is mounted on a frictionless
if 100 mol of argon is placed in a 0500-l container at 180 c what is the difference between the ideal pressure as
a 1600 kg car traveling at 175 ms to the south collides with a 3900 kg truck that is initially at rest at a stoplight
a 300-l flask is filled with gaseous ammonia nh3 the gas pressure measured at 270 c is 205 atm assuming ideal gas
a tennis player places a 50 kg ball machine on a frictionless surface the machine fires a 0054 kg tennis ball