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the pressure of 70 l of an ideal gas in a flexible container is decreased to one-half of its original pressure and its
a local jeweler purchased large amounts of pure silver because he and his staff wanted to design a new line of silver
a space station consists of two donut-shaped living chambers aand b that have the radii shown in the figure as the
a 160 kg horizontal beam is supported at each end a 300 kg piano rests a quarter of the way from one end what is the
if you have the compound na2taf7 how do you determine the charge of the cation for the transition metal in this case ta
suppose that in procedure to separate benzoic acid you mistakenly added 20 ml of aqueous nahco3 at once instead of
a ball of mass 0120 kg is dropped from rest from a height of125 m it rebounds from the floor to reach a height of0600 m
four railroad cars each of mass300 x 104 kg are coupled together and coastingalong horizontal tracks at speed vi toward
you are given a 148 m solution of ammonia in water how many milliliters of this solution do you require to produce 75
at 25 degrees celcius only 00900 mol of generic salt ab is soluble in 100l of water what is the ksp of the salt at 25
starting from rest a 52-kg blockslides 240 m down a rough 300degincline the coefficient of kinetic friction between the
a helicopter of mass 3770 kg can create an upward lift forcef when empty it can accelerate straight upward at amaximum
why does one electron in a potassium atom go into the fourth energy level instead of squeezing into the third energy
a weight lifter lifts a 320 n set ofweights from ground level to a position over his head a verticaldistance of 185 m
an elastic conducting material is stretched into a circularloop of 110 cm radius it is placedwith its plane
when 20 grams of na2co3 are dissolved in 100 g of water the temperature of the solution increases from 250degc to
radioactive carbon-14 has a half life of 5730 years suppouse a peice of wood has a decay rate of 15 disingrations per
a 117 v potential difference isapplied to a space heater that dissipates 500 w during operationa what is its resistance
iron iii sulfide reacts with carbon monixide according to the following equation fe2o3 3co yields 2fe 3co2 a reaction
the subscripts in a chemical formula represent the relative mass of each atom in a chemical compound explain
at the distance of the earth from the sun the pressureexerted by sunlight is about 10-5 pa how muchforce does this
you are standing on the edge of a turntable with frictionless bearings it is initially rotating when you catch a ball
a wastewater solution has a concentration of 452e-2 m ag ion if you have 950000 gallons of this waste solution how many
a wheel free to rotate about its axis that is not frictionless is initially at rest a constant external torque of 52
consider the titration reaction of sulfuric acid h2so4 and sodium hydroxide if 4 ml of a 10m solution of sodium