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josh starts his sled at the top of a 29m -high hill that has a constant slope of 25 degrees after reaching the bottom
describe in detail how you would prepare 300 ml of aqueous 0200m sodium sulfate what mass of sodium sulfate is
during normal operation a computers hard disk spins at 7200 rpm if it takes the hard disk 440 s to reach this angular
suppose that you are going to collect h2 gas produced from the reaction of an acid with a metal such as zinc this
the hubble space telescope orbits earth 601 km above earths surface what is the period of the telescopes
a diverging thin lens and a concave mirror have focal lengths of equal magnitude a object is placed 32f from the
a sealed tube contains 166 atm pcl5 at 500 k the pcl5 decomposes until equilibrium is established the equilibrium
an apparatus shown in the the figure below is designed to study insects at an acceleration of magnitude 958 ms 978g
a buffer is prepared by dissolving 250 g of sodium acetate nac2h3o2 in 120 l of a solution of 0560 m acetic acid
the system is being designed with 18 solec modules two parallel-series arrays of 9 modules in eachdesign wiring from
a 1300 kg car takes a 52 m radius unbanked curve at 15 ms what is the size of the friction force on the
air molecules in a warm room 27degc 300 k typically have speeds of about 500 ms 1100 mph why is it that we are
a billiard ball will stop short when it collides head-on with a ball at rest the ball cannot stop short however if
in a head-on collision a car stops in 027s from a speed of 24ms the driver has a mass of 61kg and is fortunately
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