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a person uses corrective glasses of power -85 da is this person nearsighted or farsightedb if the glasses are worn 20
the g string on a violin has a fundamental frequency of 196 hz it is 270 cm long and has a mass of 0500 g while this
when the oxide of generic metal m is heated at 250 degc only a negligible amount of m is produced o2m s lt--gt m s o2
a critical reaction in the production of energy to do work or drive chemical in biological systems is the hydrolysis of
the karat is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy an alloy
when 550 g of is added to 10000 g of water in a container open to the atmosphere the reaction shown below occurs and
this one is challenging a thin uniform pole of length 30 m is pivoted at the bottom end calculate the most probable
a 250 g sample containing as2o5 na2haso3 and other materials is dissolved and neutralized the asiii is fully titrated
an ac adapter for a laptop computer unit uses a transformer to reduce the line voltage of 110 v rms to a voltage of 185
al3 is reduced to als at an electrode if a current of 275 amperes is passed for 36 hours what mass of al is deposited
calculate the equilibrium constant for the reaction below at 25 degrees c cos 2 cr 3aq -gt co2aq 2 cr2 aq given the
what is the ph of the solution at the cathode if eo cell -0362v for the following electrochemical cell at 25 degrees c
a use coulombs law to calculate the ionization energy in kjmol of an atom composed of a proton and an electron
aa pipe is horizontal and carries oil that has a viscosity of 011 pa middot s the volume flow rate of the oil is 59
the toadfish makes use of resonance in a closed tube to produce very loud sounds the tube is its swim bladder used as
a golf ball with mass 4590 g and diameter 4260 mm is struck such that it is moving with a speed of 5379 ms and rotating
calculate the ph at the equivalence point when 50 ml of 050 m hbro is titrated with 0100 m naoh ka 25 x 10-9 for
addition of bromine to 130 mg of trans-stilbene gave 200 mg of meso-dibromide calculate the percentage
what are the rules for when the molecule goes through the chloronium ion or not for example a cyclopentane with a
two point charges are on the y-axis a 50 microc charge is located at y 145 cm and a -226 microc charge is located at y
a cylinder which is in a horizontal position contains an unknown noble gas at 526 times 104 pa and is sealed with a
a 82kg person sits on a 37kg chair each leg of the chair makes contact with the floor in a circle that is 13cm in
determine the acid dissociation constant ka for a 0010 lt nitrous acid solution that has a ph of 270 nitrous acid is a
in a strongly basic solution 5-bromo-5-methyl-1-hexanol converts to a molecule with the same molecular formula but with
which of the following processes are exothermic the formation of nabr from its constituent elements in their standard