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a billiard ball will stop short when it collides head-on with a ball at rest the ball cannot stop short however if
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how long would it take to count out 1 billion tiny invisible objects yes invisible from a bottle of these objects if
a 150-kg block of ice at 0 degc melts to liquid water at 0 degc inside a large room that has a temperature of 200degc
what is the ratio of the rate of effusion of ammonia nh3 to that of hydrogen chloride
a sample of carbon dioxide has a volume of 575 ml at 752 torr and 22degc what is the mass of carbon dioxide in this
an object at rest on a flat horizontal surface explodes into two fragments one seven times as massive as the other the
oxygen is prepared by heating potassium chlorate with manganese dioxide as a catalyst 2kclo3s2kcls302g how many grams
a an ideal gas occupies a volume of 22-cm3 at 20degc and atmospheric pressure determine the number of molecules of gas
most gases are stored and transported at high pressures a common laboratory cylinder of methane has a volume of 490 l
gas is confined in a tank at a pressure of 129 atm and a temperature of 283degc if two thirds of the gas is withdrawn
in the reaction cdcuso4cdso4cu what is the reduction half reaction what is the reducing agent explain your
first prepare a stock solution that is 100 x 10-2 m in phosphate ion how many g of na3po4 would you add to a 100 ml
a 20cm length of 026mm diameter nichrome wire is welded into a circular loop the loop is placed between the poles of
two strings equal in length and made of the same material are subjected to tensions in the proportion of 1 to 4 the
a 99 cm long spring k 900 nm is compressed by 24 cm what is the potential energy due to the spring in
a cart with mass 310 g moving on a frictionless linear air track at an initial speed of 14 ms undergoes an elastic
calculate the molarity of a solution prepared by diluting 3688 ml of 0284 m potassium chloride to 1500
a conductor in the shapr of a sperical shell of radii 8 and 11 cm is charged to 20 uca find the electric field at the
the present limit of detection of thc in urine is 20 nangrams 1 nanogram 110-9 per milliliter of urine 1milliliter
a 05118 g sample of caco3 is dissolved in 6 m hcl and the resulting solution is diluted to 250 ml in a volumetric
this compund has been measured to be 6847c and 547h the rest is oxygen what is the empirical formula specifically how
write the molecular and net ionic equations for the reaction in aqueous solution of sodium sulfide and sulfuric acid
the only two forces acting on a body have magnitudes f1 and f2 and directions that differ by an angle in radians if
an aqueous solution of iron iii chloride reacts with magnesium solid to give solid iron an aqueous magnesium chloride