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1 determine the molarity of a sodium hydroxide if 1688 ml of the sodium hydroxide solution is required to react with
an 800-n billboard worker stands on a 40-m scaffold supported byvertical ropes at each end if the scaffold weighs 500 n
an old mining tunnel disappears into a hillside you would like to know how long the tunnel is but its too dangerous to
a 72 skydiver can be modeled as a rectangular box with dimensions 25 cm40cm 18m what is his terminal speed if he falls
1 a solution of ethanol ch3ch2oh density 0795 gml is prepared by placing 300 ml of ethanol in a 20000 ml volumetric
a small block of mass m 18 kg slides without friction along the loop-the-loop track shown the block starts from the
a uniform metal rod with a mass of29kg and a length of09m is attached to a wall by a hinge at its base a horizontal
a give the formula of the conjugate base of the following bronsted-lowry acids explain your reasoninga ch3nh2b hpo42-c
a spring is resting vertically on a table a small box is dropped onto the top of the spring and compresses it suppose
the earth rotates about its axis once in one sidereal day of 23 h 56 min calculate the centripetal acceleration of a
a cylindrical beaker of height 0100 and negligible weight is filled to the brim with a fluid of density 890 when the
find the specific heat of an unknown metal if a 355 gram sample at 996 degrees celsius produced a resulting temperature
four particles each of mass 200 g that form a square with an edge length of d 0800 m if d is reduced to 0300 m what is
the enthalpy change for the reaction between ws and cgraphite is difficult to measure directly because the reaction
in a certain binary-star system each star has the same mass which is 96 times of that of the sun and they revolve about
a toothpaste contains 024 by mass sodium fluoride used to prevent dental caries and 030 by mass triclosan a
the generator in a purely capacitive ac circuit has an angular frequency of 126 rads and a maximum voltage of vmax 129
a lightbulb filament has diameter 570times102 mm and carries 0857 aa find the current density in the filamentb find the
a person who has taken antibiotics for several weeks because of a severe bacterial infection may develop a deficiency
a balloon of volume 43 m3 contains argon gas at a pressure of 20 105 pa and room temperature 20degc what is the total
a 500g ball moving at 100cms x collides with an identical ball at restthe incoming ball scatters at 30 degrees with
the polymerization of styrene to polystyrene can also be catalyzed by benzoyl peroxide write the equation for this
a volleyball is spiked so that its incoming velocity of 479 ms is changed to an outgoing velocity of -120 ms the mass
youre working on a new high-speed rail system it uses 6000-horsepower electric locomotives getting power from a single